[squid-users] Logon to specific machines

Hi,

I am using Squid 3.0 on a Fedora 5. Authentication is thru ncsa_auth.
My question is, is there a way to limit the users to access the
internet only in some specified machine. The control will be based on
the login account. Example, user squid_user can only access the
internet if he uses IP address 192.168.20.10.

Is this possible?

Thanks for the help!

-- 
knowelle