different Author as the security login

[mr. helper]

Hi everybody,
I enabled the security for my EA database.
I created ONE user for all modeller, and some extra admin accounts.
If a modeller is logged in and create a new element the author is always the same.
Is it possible to change this for every installation?
I change it in the option, but it never works.
Before I enabled the security it works fine, the author was the windows domain login.

thank you

bye
helper