We have a Windows Server 2003 AD DC running here in our office, and I was wondering if it's possible to group some employees to use a specific DNS forwarder, and some to use a different forwarder? I can't find out how to do this at all, and I've been looking for a month or so.
Based on your comments to your question:
This page seems to imply that you can implement granular control of DNS resolution via OpenDNS based on AD computers and groups. http://www.opendns.com/insights