Redwood - Update DFF when field value changed

Summary:

I asked this question previously and received an answer that it was not possible.

I'm asking the question again now specifically with Redwood in mind and if that has given us any new possibility.

I have a req line DFF (Initiative) with an LOV, the SQL restricts the LOV based on :{PARAMETER.RequesterId}, this is working fine.

The customer doesn't want to use :{PARAMETER.RequesterId} which is set on entry to the req form, instead they would like it to be driven from the requester entered in the delivery section as the users use this field to change the requester.