Monitoring applications &/or sessions on Terminal Server

Does anyone know if it is possible to monitor a certain application running in multiple sessions on Windows Terminal Server? Specifically, I need to know how much server resources an app is using for each logon in Windows 2003 Terminal Server. A app is maxing out the CPU on the terminal server causing many complaints from users regarding the extreme slowness of the servers…

Any help would be emencly appreciated.

Delmar