I suppose it would depend on the program's primary purpose. If it was the equivalent of "God mode" and the spying power was just one of many abilities, then yes

I suppose it would depend on the program's primary purpose. If it was the equivalent of "God mode" and the spying power was just one of many abilities, then yes, the dictionary definition of "overlord" would make sense. If the explicit purpose was spying on users, however, the StarCraft unit reference seemed more apt because the Overlord unit is often used in early game to do recon, often before the other player has had a chance to build anti-air defenses, such that the Zerg player can "spy" on the other bases without their being able to do anything about it.