No, killing people is ok. (Well, no, it's not, but you're not any more of a **** if you do it with magic). Turning someone into an animal, torture that deforms the body, that sort of thing. If it's Lovecraft-approved, they send a Blackcloak after it.
This is a relatively new faith, and is still pretty flexible. Not tolerant or forgiving, but not bogged down in centuries of "divinely-inspired" bureaucracy.