How to customize the session name

Good afternoon! We are trying out Remote Desktop Manager and are very impressed. I have a question, though: Is there a way to show the description from Active Directory in the session name? We put the name of the user currently assigned to a particular computer in the Active Directory computer description and would like to automatically display it alongside the session name. For example:

Session name: Computer1 - John Doe

I know we can add them manually, but since the names are already in Active Directory, we'd rather not do so. I've tried adding the (locally) logged-on user name to the session name field by using the %USERNAME% variable, but it just always shows up as "%USERNAME%". It doesn't work in any of the other fields I've tried either.

Any help you can provide will be greatly appreciated!