In Orion 2015 (I have not worked this in 2016), it is possible to add multiple limitation criteria (Group of Nodes, Group of Groups, etc). I was humored to find that the multiple criteria are logically "AND"ed together. My preference would be for a logical "OR". I operate in an environment where I could create a specific group of objects and then add the single group, but it makes more logical sense to default to the OR condition.
The question (hopefully on topic "User eXperience"):
Are other admins working around this to get the limitation right? How do you do it? Would you find it helpful to have a boolean operation drop-down in the limitation definition?