access to web sites and such.....

[kmcgavran]

Is there a convenient way to restrict access to web sites for multiple browsers on a per user basis? Or do I have to restrict system wide? I.E. can I have somewebsite.com allowed for users a, b, and d, but not c and someotherwebsite.com allowed for users b, c, and d, but not a and by default allow websites? Or would I have to restrict both for all users?

Thanks for any help.

Kenneth