Change users in secured Access application

I have an Access 2003 application set up with user-level security. Is it possible, after opening and logging into Access, to be able to change users? Ideally, my client would like to be able to click a button (or something) and be prompted for a different user login. I told him I didn't think it was possible without closing and re-opening A开发者_开发百科ccess, but if it is it'll make me look good. That's always important.

No, it's not possible. I've seen this asked and answered by folks in the Microsoft newsgroups who know Access user level security far better than I do.