Question : XP Remote Desktop Connection

I have a windows XP Sp3 computer. This computer has an application that runs 24/7.
 I would like to connect to it using RDC from a remote computer, but not affect any applications running on the machine.

My question is:
When you remote connect using RDC, does it logoff the current user? If this is the case then I assume it going to shutdown any running apps?.  Can you have RDC work like VNC (I only need one user/connection).

Answer : XP Remote Desktop Connection

It does not appear to be available in 2000/2005, but 2008 has Resource Governor

http://www.sql-server-performance.com/articles/per/Resource_Governor_in_SQL_Server_2008_p1.aspx