Hello Edwin,
As you can see also in the Dev Guide, .e.g Step 9:
Using the AD Import Wizard, this utility doesn't support any conditional roles associations yet.
What you can do is e.g. to create a
Global Event which will be fired when the New User is created (OnBeforeSave, OnAfterSave event.) and then change the role according on the Department or whatever you want.
Best regards,
Martin Danko