View logins for external users to use specfic pool

I have two view servers. One for internal to the college and one for outside the college.  In our environment we have 15 pools but I would like the external users to be assigned to one specific pool to get their non persistent desktop.  The reason for this is that each room gets its own pool with a specific amount of machines.  I don't want some logging in and taking a vm that is assigned to a class that is full at that time, and other reasons.

Thanks

       Dave.