How assign a requestor on an AP invoice based on supplier #

Cloud Financials 11.5.10.2

I want to assign an invoice that came in via IDR to a specific requestor at the AP invoice header. Is the correct thing to do is update the ApIncompleteInvoiceTemplateHold BPM workflow? I was thinking of adding a new assignee the the if statement said

If InvoiceHeader Supplier Number is "117095" then assign Invoice Header.Requester Name = "User name"

Is that correct or is there another way? Am I even in the correct BPM workflow

Thanks