The One Giver is strictly the supreme being of the Demon: The Fallen game line, which presents a really distinct Creation Myth and cosmology from the Big Three (Vampire, Werewolf and Mage) that, going by the Fractured Cosmos plot-device presented in Ascension, is pretty much just a part of an alternate Tapestry, so, it's not really the Supreme Being of the verse as a whole anymore, no.