how to set up a group policy attached to a group or single user

I am trying to figure out how I can attach a group policy to either a user or a group of users within a OU. Specifically, I am setting up remote access using terminal server. I want to create the group policy in the same container as where the users are currently located. domainname.ca.local/local users
Normally, I would create another OU right under local users and call it ts users...
domainname.ca.local/local users/ts users
...but I believe there is a way to do it so that I can use the same OU where the users are located and just add them to a group to take on the group policy. I am running Windows 2003 Standard
Thanks in advance for the help