Seeing as how you mentioned "around the internet" (so probably outside of JoS), most things they say 'out there' about Father Satan is bullshit. Yes, it is possible to assume the physical form of something else, which is called shapeshifting, but it's not something that can be done just like that. Even if one has been a dedicated Spiritual Satanist for years, and has meditated to expertise extent, shapeshifting would cause a ton of problems since one's chakras would still need to be aligned healthily, things would feel very uncomfortable in their shapeshifted form, and one would probably feel disorientated with the eyes of an animal, whatever.
Short answer: no, I don't think there is such a thing as a ritual that'll turn you into a werewolf.