How can PO header and item tabs appear conditionally?

The Business Add-In (BAdI) ME_GUI_PO_CUST enables you to integrate our own subscreens into the Enjoy purchase order at both header and item levels.

I need to conditionally determine if the subscreens should appear or not. For example, for Purchase Org '1000' do not show the customer data tab subscreen. Or for document type 'ZXYZ' show subscreen 9000 at the item level and for document type 'ZABC' show subscreen 9001 at the item level.

However, using the SUBSCRIBE Method in my custom implementation the only detail available is whether the process is for a PO and then whether it is HEADER or ITEM.

Has anyone ever had this same requirement and how were you able to conditionally specify the subscreens for the PO Header or Item?

Best Regards.