Hi! I'm relatively new to this forum, but I think this quote from the Connlaoth page says it all, "Mages and magical creatures who do not use magic can live normal (if somewhat nervous) lives in Connlaoth, so long as they do not use their power." Given how wary Connlaothans are of any use of magic, I'm pretty sure they would view fire breathing as magical, even if its a completely natural ability. Whether flying is allowed is sort of up in the air (pun not intended, I swear), but I'd go with 'probably not'.