JDE E1: Orchestration - Voucher match process

Hi,

We are trying to do voucher match process through orchestration.

Voucher match process is defined as Form_Request.

There may be no.of PO's to be voucher matched for a supplier. But we need to match only selected PO's out of all open PO's.
When we run this process in orchestration how can we define the PO numbers to be used for receipts to match.

Regards,

Kaliraj