diff --git a/app/runtime/log.py b/app/runtime/log.py
index a6349362c..57ff28f88 100644
--- a/app/runtime/log.py
+++ b/app/runtime/log.py
@@ -384,6 +384,8 @@ class LoggerManager:
         """
         识别日志调用文件和插件来源。
 
+        虚拟实例共享物理源码，因此优先使用实例专属模块命名空间路由日志；
+        无模块身份的旧插件仍按调用文件路径识别。
         插件调用宿主公共方法时，调用栈中仍保留插件帧，因此日志继续进入该插件
         的独立文件，而不是混入主程序日志。
         """
@@ -400,6 +402,16 @@ class LoggerManager:
             parts = filepath.parts
             if not caller_name:
                 caller_name = parts[-2] if parts[-1] == "__init__.py" and len(parts) >= 2 else parts[-1]
+            module_name = frame.f_globals.get("__name__")
+            if isinstance(module_name, str):
+                module_parts = module_name.split(".")
+                if (
+                    len(module_parts) >= 3
+                    and module_parts[:2] == ["app", "plugins"]
+                    and module_parts[2]
+                ):
+                    plugin_name = module_parts[2]
+                    break
             if "app" in parts:
                 if not plugin_name and "plugins" in parts:
                     try:
diff --git a/tests/test_log_plugin_routing.py b/tests/test_log_plugin_routing.py
new file mode 100644
index 000000000..a7194fdb6
--- /dev/null
+++ b/tests/test_log_plugin_routing.py
@@ -0,0 +1,56 @@
+"""插件日志文件路由测试。"""
+
+from pathlib import Path
+from types import SimpleNamespace
+
+from app.runtime.log import LoggerManager, logger
+
+
+class CapturingLogWriter:
+    """记录日志写入目标，避免测试访问真实文件系统。"""
+
+    def __init__(self) -> None:
+        self.entries: list[tuple[str, str, Path]] = []
+
+    def write_log(self, level: str, message: str, file_path: Path) -> None:
+        """保存单条日志的级别、内容和目标路径。"""
+        self.entries.append((level, message, file_path))
+
+    @staticmethod
+    def shutdown() -> bool:
+        """测试写入器没有待释放资源。"""
+        return True
+
+
+def test_virtual_plugin_routes_log_by_runtime_module_identity(monkeypatch, tmp_path):
+    """共享物理源码的虚拟实例应按运行实例 ID 写入独立日志文件。"""
+    writer = CapturingLogWriter()
+    monkeypatch.setattr(LoggerManager, "_writer", writer)
+    monkeypatch.setattr(LoggerManager, "_log_path", tmp_path)
+    monkeypatch.setattr(
+        LoggerManager,
+        "_get_console_logger",
+        classmethod(
+            lambda _cls, _logfile: SimpleNamespace(info=lambda *_args, **_kwargs: None)
+        ),
+    )
+    namespace = {
+        "__name__": "app.plugins.mediawarp1",
+        "logger": logger,
+    }
+    source = compile(
+        "def emit_log():\n    logger.info('virtual instance started')\n",
+        "/config/app/plugins/mediawarp/__init__.py",
+        "exec",
+    )
+    exec(source, namespace)
+
+    namespace["emit_log"]()
+
+    assert writer.entries == [
+        (
+            "INFO",
+            "mediawarp - virtual instance started",
+            tmp_path / "plugins" / "mediawarp1.log",
+        )
+    ]