diff --git a/frontend-new/src/components/UserHeader.vue b/frontend-new/src/components/UserHeader.vue
index 14beb2e18..40011c374 100644
--- a/frontend-new/src/components/UserHeader.vue
+++ b/frontend-new/src/components/UserHeader.vue
@@ -32,7 +32,7 @@ const canEditCurrentUser = computed<boolean>(() => {
 
 <template>
   <Card accent>
-    <div class="flex mb-4">
+    <div class="flex mb-4 md:mb-0">
       <div class="relative">
         <UserAvatar :username="user.name" :avatar-url="avatarUrl(user.name)" />
         <AvatarChangeModal v-if="user.isOrganization && hasPerms(NamedPermission.EDIT_SUBJECT_SETTINGS)" :user="user" />
@@ -41,9 +41,12 @@ const canEditCurrentUser = computed<boolean>(() => {
       <div class="ml-2 overflow-clip">
         <h1 class="text-2xl text-strong inline-flex items-center">
           {{ user.name }}
-          <a v-if="!user.isOrganization" class="inline-flex mx-1" :href="forumUserUrl(user.name)" :title="i18n.t('author.viewOnForums')"
-            ><IconMdiOpenInNew
-          /></a>
+          <a v-if="!user.isOrganization" class="inline-flex mx-1" :href="forumUserUrl(user.name)" :title="i18n.t('author.viewOnForums')">
+            <IconMdiOpenInNew />
+          </a>
+          <span v-if="user.locked">
+            <IconMdiLockOutline />
+          </span>
         </h1>
 
         <div>
@@ -55,8 +58,6 @@ const canEditCurrentUser = computed<boolean>(() => {
             :action="`${user.isOrganization ? 'organizations/org' : 'users'}/${user.name}/settings/tagline`"
           />
         </div>
-
-        <!-- todo lock user modal -->
       </div>
       <div class="flex-grow" />
       <div class="<md:hidden flex flex-col space-y-1 items-end flex-shrink-0">
diff --git a/frontend-new/src/components/modals/LockUserModal.vue b/frontend-new/src/components/modals/LockUserModal.vue
new file mode 100644
index 000000000..96d402c10
--- /dev/null
+++ b/frontend-new/src/components/modals/LockUserModal.vue
@@ -0,0 +1,61 @@
+<script lang="ts" setup>
+import { useI18n } from "vue-i18n";
+import Button from "~/components/design/Button.vue";
+import Modal from "~/components/modals/Modal.vue";
+import { useInternalApi } from "~/composables/useApi";
+import { handleRequestError } from "~/composables/useErrorHandling";
+import { AxiosError } from "axios";
+import Tooltip from "~/components/design/Tooltip.vue";
+import { useContext } from "vite-ssr/vue";
+import InputFile from "~/components/ui/InputFile.vue";
+import { User } from "hangar-api";
+import { ref } from "vue";
+import { useRouter } from "vue-router";
+import InputTextarea from "~/components/ui/InputTextarea.vue";
+import { useNotificationStore } from "~/store/notification";
+
+const props = defineProps<{
+  user: User;
+}>();
+
+const i18n = useI18n();
+const ctx = useContext();
+const router = useRouter();
+
+const comment = ref<string>("");
+
+async function confirm(close: () => void) {
+  try {
+    await useInternalApi(`admin/lock-user/${props.user.name}/${!props.user.locked}`, true, "post", {
+      content: comment.value,
+    });
+    close();
+    router.go(0);
+    useNotificationStore().success(i18n.t(`author.lock.success${props.user.locked ? "Unlock" : "Lock"}`, [props.user.name]));
+  } catch (e) {
+    handleRequestError(e as AxiosError, ctx, i18n);
+  }
+}
+</script>
+
+<template>
+  <Modal :title="i18n.t(`author.lock.confirm${user.locked ? 'Unlock' : 'Lock'}`, [user.name])">
+    <template #default="{ on }">
+      <InputTextarea v-model="comment" />
+
+      <Button button-type="secondary" class="mt-2" @click="on.click">{{ i18n.t("general.close") }}</Button>
+      <Button button-type="primary" class="mt-2 ml-2" @click="confirm(on.click)">{{ i18n.t("general.confirm") }}</Button>
+    </template>
+    <template #activator="{ on }">
+      <Tooltip>
+        <template #content>
+          {{ i18n.t(`author.tooltips.${user.locked ? "unlock" : "lock"}`) }}
+        </template>
+        <Button size="small" class="mr-1 inline-flex" v-on="on">
+          <IconMdiLockOpenOutline v-if="user.locked" />
+          <IconMdiLockOutline v-else />
+        </Button>
+      </Tooltip>
+    </template>
+  </Modal>
+</template>
diff --git a/frontend-new/src/pages/[user]/index.vue b/frontend-new/src/pages/[user]/index.vue
index 9829cf6dd..dab94162c 100644
--- a/frontend-new/src/pages/[user]/index.vue
+++ b/frontend-new/src/pages/[user]/index.vue
@@ -25,6 +25,7 @@ import IconMdiWrench from "~icons/mdi/wrench";
 import IconMdiKey from "~icons/mdi/key";
 import IconMdiCalendar from "~icons/mdi/calendar";
 import OrgVisibilityModal from "~/components/modals/OrgVisibilityModal.vue";
+import LockUserModal from "~/components/modals/LockUserModal.vue";
 
 const props = defineProps<{
   user: User;
@@ -40,6 +41,7 @@ if (props.user.name === useAuthStore().user?.name) {
   organizationVisibility = await useOrgVisibility(props.user.name);
 }
 const orgRoles = useBackendDataStore().orgRoles;
+const authStore = useAuthStore();
 
 interface UserButton {
   icon: FunctionalComponent;
@@ -68,6 +70,8 @@ const buttons = computed<UserButton[]>(() => {
   return list;
 });
 
+const isCurrentUser = computed<boolean>(() => authStore.user != null && authStore.user.name === props.user.name);
+
 useHead(useSeo(props.user.name, props.user.tagline, route, avatarUrl(props.user.name)));
 </script>
 
@@ -89,6 +93,8 @@ useHead(useSeo(props.user.name, props.user.tagline, route, avatarUrl(props.user.
             <Button size="small" class="mr-1 inline-flex"><component :is="btn.icon" /></Button>
           </Link>
         </Tooltip>
+
+        <LockUserModal v-if="!isCurrentUser && !user.isOrganization && hasPerms(NamedPermission.IS_STAFF)" :user="user" />
       </Card>
 
       <template v-if="!user.isOrganization">