Is "Filtered Totals" it's own measure or is it a breakdown of a dimension?
If it's its own measure then this an easy calculation:
Filtered Totals Calc:
if [Set] then Total end
When you use a set in a calc it acts like a boolean that says "Only include records that are in the set"
This is an example I did with sales for states where I have a set of customers I don't want to use in the Filtered Total:
Thanks Arron, You pointed me in the right direction. Problem Solved.