No real restrictions here in NZ, except (from memory) in Customs sand immigration. When I was based in Queenstown, we'd (politely) stop people from taking pictures when embarking/disembarking the aircraft as they were crossing the tarmac. This was purely for the reasons of safety and to get the passengers off the operational area in an orderly fashion. Once they were (still airside btw) on the walkway behind the railings they were more than welcome to take as many photographs as they wished.