[Samba] Samba 2.3.3a and user/server Manager unix groups visible?

[Erik Ranà]

Hello.

If i run user manager on a machine that is a member of my domain
i can list all groups and the unix system root account.
Im not able to change groups of a user.

Is this by design?
I feels alittle bit strange that it is possible to view unix grouups and 
users on the WinNT domain?
Can i somehow hide groups so the only relevant groups for the domain is 
shown in user manager?
Something equal to a user.map function? there i can both map a backend 
unix group to frontend user manager , and filter so groups that are not 
relevant to samba and NT domain administraton are not shown in the user  
manager..

/Erik Ranà