RDP Load balancing (pool routing) based on user or hostname

I was thinking along those lines at first but managing those data groups will be quite challenging. These data groups would need to be managed in the LTM config while the users and everything about them is managed in the Active Directory. There are over 300 active users and things are changing with them all the time (i.e. new ones coming on, users changing their names and users being removed from the system). If possible it would be much better not to have data groups but rather look up the information straight out of the AD.

Dominique