The people Lucifer worked for was a group mentioned by Lucifer in a video he made upon arriving in "Kingdom United"; he spoke of how they were holding Babylon hostage, threatening to destroy her if Lucifer didn't find Lilith. It is heavy implied they are Faction Paradox.
Lucifer also indicated that these people were also searching for Lilith independently of his efforts. (WC: Mission: Find Lilith [+]Loading...["Mission: Find Lilith (webcast)"])