I'd like to use Lightroom Mobile for business stuff and save my standard iPhone Camera Roll for personal photos. I'd also like to keep those business photos out of my iCloud entirely. Right now, no matter what I do, everything I shoot in Lightroom Mobile ends up on my camera roll.
Is this possible?
That is and iPhone problem, not LR specific. When using whatsup or similar, every picture I read goes into my camera roll. So I suppose that's how Apple designed it. Look in the iphone settings, but I doubt that you can change something there.
Files that I syncronise from my desktop LR to LR mobile do not end up in the camera roll and stay private to LR.