I'm using the part of Stingo macro to modify Author field in doc file (with Word 2003) -
https://www.mobileread.com/forums/sho...4&postcount=23
So if one uses this macro, Author field contains "L.Carrol" or whatever you put there. Similar macro exists for OO as well. If I were you (and knew how to do good programming) I'd take what is meta:initial-creator>....</meta:initial-creator> and leave for people to modify this field in their files with additional macros.