Since when does a NZ order apply to a non NZ company. For example, American media regularly publishes the names of persons charged with crimes in Canada where the name may be banned from publication by a Canadian court. It's a first amendment thing.
If US companies start obeying orders like this, how is it any different from getting a court order from a "totally neutral" court in Hong Kong, actually controlled by beijing, to de-anonymize the users of an american-based web service.
Looking at the details, it appears that they were sued in a us court in California, so the order does apply.