Can DFF be used to update GL Account in distribution

Summary Can punchout req have DFF tied to categories that is then used to override the GL account on distribution

Content (required):

For punchout reqs once you punchout to your cart in Oracle then you can no longer make updates to the categories used for that particular line. While we understand you need to ultimately update the mapping sets - to keep things moving we were wondering if we can use a DFF for 'category override' where requester would select different catgeory than what is present on req (i know this is possible) but then that DFF would drive to override the GL account used in the distribution on that line.