Since it's an embedded report, your filter outright will be the report link settings. When you go into the report link, your initial value that is the match will come from the main app, and then the second input in the 'values in this field' will be the matching value in the target app where you're reporting. In this case you're targeting a whole other app, and then picking out the values between the two that make them match.
Well it worked! That is what I was trying to do earlier. Thanks so much for your guidance!
