I'd like to know if it's possible to do this by zen:

If there is a workstastion that haven't installed the agent Zen,
but a user use a "username" that has associates some policies (some on a
level of organization unit and others on a level of user).
What's happen?
The policies will not apply. is it correct?

Is there a log where is written this?
is it possible for example give an alert?

I hope that I have explain my problem clear enough.
Excuse me for my poor english.