There's onLevelFileUpdated(filename) which will let you track uploads/deletions but not who was responsible for it.
I.e:
PHP Code:
function onLevelFileUpdated(filename) {
if (fileexists("levels/" @ filename)) {
echo(extractfilename(filename) SPC "was updated!");
} else {
echo(extractfilename(filename) SPC "was deleted!");
}
}
I don't think it's possible otherwise.