How to use one input control to manipulate non related measures

I have a report with charts on it that is combined from 4 different data sources. This report is basically a scorecard for salespeople.

Each data source has a field for the last name of the salesperson, we call it "RSM"

So since I have all of these charts that come from 4 different data sources, the only way I can currently filter the entire report to one RSM is to have 4 different input controls that must also be selected with the same name.

I am trying to figure out a way to say when the value of the main input control is selected then it will automatically filter the others with the same name.

Something like this is what I am trying to do:

=If(ReportFilter([Quotes].[BP: RSM]))="Anderson" Then (ReportFilter([RSM]))="Anderson"

Is this possible to do?

If not, is there a way to write a formula that will automatically filter the other data sources?

Thanks in advance!