How to make Subreport show values for a particular group/header?

[pianoprodigy]

I have made 3 subreports each of which displays one of 3 different sets of info based on where a record falls in a date category. Different people are assigned to these files. I made a query which creates a list of each of the assigned individuals. That query is the source query for the main report. The "Assigned Individual" is a "group" in the report with a header and footer. I want to make each of the 3 subreports to only show the values where the "Assigned Individuals" match. So, Assigned Individual #1 (Subreport #1 with only his records, Subreport #2 with only his records, Subreport #3 with only his records). Then, Assigned Individual #2 (you get the idea)...

I have tried a filter, but can't seem to make it work (e.g. Assigned Individual.Main Query = Assigned Individual.SubQuery