In the File Properties dialog, it is not possible to edit directly the information of the author of the document. Which is very annoying for a document where there are several authors for exemple. It is easily possible in MS-Word. That should be possible to edit this data, usually copied from the Tools > Options > LibreOffice > User Data > First/Last name/Initials.
Reproducible with LO 4.4.1.2, Win 8.1 For me this sounds like a good enhancement proposal.
That would be a great enhancement for, at least, scientists (papers with several authors).