Modify or change creator of a changeset
One answer
As far as I know you cannot change the name of the creator of the change set. One way to do it is the other developer can accept the change set to his/her workspace, create a patch, discard the original change set and create a new change set from the patch.
If you want to track who delivered the change set then from 5.0.1 onwards the history view shows who delivered the change set to the stream apart from the creator information.