OK I want to make sure a GPO doesnt get applied to a user (my boss) in Group Policy. I could make his own OU but for the purposes of me learning WMI lets not consider that an option.

I am able to filter the GPO by using a WMI filter that states - "apply this GPO if this computername does not equal the bosses computer name" by using the following WMI syntax filter:

"SELECT * FROM Win32_ComputerS ystem WHERE...