SK and WDRAIN1 - thank you for your comments!
Turns out, I was able to target the security groups in the AD import process and check the box the import the Users-to-Machines.
These are then found under Manage > Filters > Notification Server Filters > Directory Filters > {domain.name}Filter > Security Groups with a second folder containing the computers.
I then used these filters in my managed sofftware delivery policy and it has worked great.
Sorry for the delays in responding back here.
v/r
Steve