SAP C4C - I need to filter this products based on customer

Hello guys, i'm relatively new as a developer in SAP C4C and i'm trying to filter this products ( it's on ServiceRequest ),

based on Customers. Example: If customer X is selected, then when i press the OVS button, it should show all the products from that customer X.

But instead, it shows all products from ServiceRequest-.MainServiceReferenceObject-~MaterialUUID

Do anybody have a clue?