In NTA you could create an IP address group in NetFlow settings, then use Traffic view builder to view it.
I could not add the IP address group as the 10.0.0.0 already exists and the IP's I want to split out are 10.61.8.0/24.
Also, maybe since you are a Mod this thread should be in the NTA forum? I had not clue where to post the question at first.
I think I figured it out - I first had to realize that killing the "builtin" IP address groups was not going to harm anything.
I nuked the builtins and created my group and I think I am good.