Requirement to Default the Requisition line level DFF based on the Requesters cost Center

Requirement: We have created a DFF called "Requester's Own Cost Center" with Values Y and N.

For Example, if Requester A is from Cost Center 1234 and the Charge Account's Cost Center segment is 1234, then this DFF should default to Y.

If Requester A is from Cost Center 1234, but the Charge Account's Cost Center segment is not 1234 and is different, then the DFF should default to N.

Please help us achieve this, as currently, the users are doing it manually. Because of this, many Issues are missing.

Thanks,

Bala