Is it possible to encumber funds at one chartfield level (i.e. Program but no DeptID) and then add a

Nobody at our agency is very familiar with the Purchasing/Encumbrance process. It was set up by implementation/upgrade consultants who are long gone. The business managers are asking if it is possible to encumber funds at one chartfield level (i.e. Program but no DeptID) and then add another chartfield (DeptID) on the voucher when it is paid?

We use commitment control.

They want to encumber PO funds at the level of Account, Fund, Program (specific to one District) and then when the receipt/voucher comes in, they want to add the DeptID of the specific work unit that actually used the product.