@matt: If two people have the same file open at the same time, first write will use the current file name, second write will append the name of the file server that the second write occurred on.
Example. Donovan and Orin are working on the same file "TilleyHatConspiracy.docx". Donovan is working on it on FS-SEA and Orin is working on it from FS-MEL. Donovan saves the file first, so Donovan's version will be TilleyHatConspiracy.docx. Orin saves after Donovan, so his version will be TilleyHatConspiracy-FS-MEL.docx.