Two orders, each with its own jobnumber, two paper suppliers, export together within same DDS

A print order is produced in 2 order items within the same customer order. Paper is not ordered from the same paper supplier for both order items. There are two different paper suppliers. Each order item has its own order number in the ERP system. Both print products are exported together to the DACH region for the customer.

How is it ensured that there is a separate DDS for each order number, even if the paper comes from the same supplier?