It depends on the version.
In 5.2 it's the the rule module "Windows XP Remote Control Module".
In 6.X I didn't see a comparable rule module but it wouldn't be difficult to create a rule using the User State set:
"Remote Interactive Logon [V6.0.1 r106] MS defined - All users who log on to the computer using a Remote Desktop connection."
and " RDP [V6.0.1 r106] Remote Desktop Protocol (Microsoft) Network Service " variable.