Quote Originally Posted by Mike Hildner
I guess on the client's end, the network admin could disallow access to a certain site, which is what he promised.

Simplay have a way where the admin can specify specific IP adress or range of IP adress which can/can not access the site. Admin can add delete this list as he wish. I use this approach for this similar requirements.. Then simply check if those IP adress before allowing disallowing users access to the site..