diff --git a/src/infra/local-tui-processes.test.ts b/src/infra/local-tui-processes.test.ts
index b8dcdf78e9b7..fcccb27b9239 100644
--- a/src/infra/local-tui-processes.test.ts
+++ b/src/infra/local-tui-processes.test.ts
@@ -2,11 +2,18 @@ import { describe, expect, it, vi } from "vitest";
 import {
   listLocalTuiProcesses,
   quiesceLocalTuiProcessesBeforeUpdate,
+  resolveLocalTuiUpdateLockPath,
   terminateLocalTuiProcesses,
   waitForLocalTuiUpdate,
 } from "./local-tui-processes.js";
 
 describe("local TUI processes", () => {
+  it("scopes the update gate to the invoking user's home", () => {
+    expect(resolveLocalTuiUpdateLockPath("/home/alice")).not.toBe(
+      resolveLocalTuiUpdateLockPath("/home/bob"),
+    );
+  });
+
   it("lists only verified local TUI processes from ps output", () => {
     const spawnSync = vi.fn().mockReturnValue({
       status: 0,
diff --git a/src/infra/local-tui-processes.ts b/src/infra/local-tui-processes.ts
index d3682b5ee367..39ab585bc2df 100644
--- a/src/infra/local-tui-processes.ts
+++ b/src/infra/local-tui-processes.ts
@@ -1,4 +1,5 @@
 import { spawnSync, type SpawnSyncOptionsWithStringEncoding } from "node:child_process";
+import { createHash } from "node:crypto";
 import os from "node:os";
 import path from "node:path";
 import { parseCmdScriptCommandLine } from "../daemon/cmd-argv.js";
@@ -29,7 +30,12 @@ type PsResult = {
 
 const LOCAL_TUI_SUBCOMMANDS = new Set(["chat", "terminal", "tui"]);
 const LOCAL_TUI_PROCESS_PROBE_TIMEOUT_MS = 1_000;
-const LOCAL_TUI_UPDATE_LOCK_PATH = path.join(os.tmpdir(), "openclaw-local-tui-update");
+export function resolveLocalTuiUpdateLockPath(userHome = os.homedir()): string {
+  const ownerScope = createHash("sha256").update(userHome).digest("hex").slice(0, 16);
+  return path.join(os.tmpdir(), `openclaw-local-tui-update-${ownerScope}`);
+}
+
+const LOCAL_TUI_UPDATE_LOCK_PATH = resolveLocalTuiUpdateLockPath();
 const LOCAL_TUI_UPDATE_LOCK_OPTIONS = {
   stale: 30_000,
   retries: { retries: 100, factor: 1, minTimeout: 50, maxTimeout: 250 },