I want to create one purchase order for two company (X-Y)

1-I have one COA for two company (X - Y)
2-I have one ledger for two company (X - Y)
3-I have two legal entity for two company (X - Y)
4-I have two Operating unit for two company (X - Y)
5-I have one budget accounting controller for two company (X - Y)
6-I have one master Items for two company (X - Y)
If I open Purchasing responsibility that ows to company X
I want to create one purchase order that have two lines:-
First line that shipment oragization for company X
Second line that shipment oragization for company Y