Hello,
Then you might want to look at Untangle if you seriously doing contents filtering by URL/URI.
I don't know Squid does help you alot. The last resort I can think of now is that, assuming the
users are using Windows, then install some sort of personal firewall thingy on it and configure
go/no go locally. Most of firewall progy does that easy.
Note: I dont nice speak english , sorry
Never mind, me neither speak. There are some non-English forums here so take a look.
cheers,