Yes. One Change Order Client can have several lines, and each line can have its own production code. The production codes are not shown in the export to the client.
How to do it
Open the change order in Change Order Client.
Click Add to add a line for each part of the change order.
Select the right production code in the Production code column on each line.
Save.
Good to know
This way, cost and income are distributed correctly across the production codes, even though the client only sees one change order.
Each line can be linked to one or more UE change orders.
You can add new lines even after the change order has been approved.