In early versions of VIVO (circa 2012), the log attempted to record manual edits and who made them. There was an [Add] annotation with the username of the person making the add, along with the triple that was added. There was a [Delete] annotation with the username of the person making the delete, along with the triple that was deleted. I say "attempted" because there were issues at the time withe the attribution to a user – it was inaccurate. But since then, it appears the feature was removed (prior to VIVO 1.4 where the GitHub records start).
This is an important capability for log reporting, and for data lineage and system provenance.