I found this page about using usernames to build a sccm collection query.
This works great! However, the list I got was in FirstName LastName format and not username. Each FirstName LastName corresponds to the common name in AD. Of course you can take each FirstName LastName and input it into SCCM to find username and create your own username list. However that would take to long.
Could I take a list of FirstName LastName convert it to username list in order to build the collection query based on the username?