The Luciferian "Satanist" type admit and champion a selfishness. "Do what thou Wilt" The individual soul does not subjugate in devotion to the Whole /absolute. They do their rituals for selfish ends.
The "gnostic" who is a knower of the truth, is surrendered in devotion to g-d / the whole / the Absolute / the ground of all being / the divine love / the supreme teacher.
The "Satanic" types who are selfish are actually not true gnostics / knowers. They use techniques / technology to try to fulfill their own desires.
Ironically they will never be fulfilled.