Squid authentication

[Marcelo Magno]

I read that by ACLs in the squid configuration we can block some sites
and block some user ips from accessing the cache, (and by that prevent
some users not to access the internet).

I have a problem that I need to configure how a PERSON can access the
internet, not am IP because the same machine is shared by two or more
users.

Is there a way to have squid to give (or not) access based on groups on
a windows domain like samba does with winbind?

Can anyone point me some docs on how this is done?

Thanks in advance,
Marcelo Magno