Hello,
I believe those is to exclude or include which software to or not to group together when your move an application on top of the other.
For example if you set the option "Always group windows when moved on top of each other". You have an option to select some application not to group when you move it ontop of other application when you include that application in the "Application exclusion" list.
Thanks
Basj,
Stardock Community Assistant.
