A gag order only applies to those individuals and entities that the judge has jurisdiction over. However, when subject to a gag order, you can't use proxies/surrogates to get around the order.
What about posts on either site by an individual, even a campaign employee, done not at the direction of Trump. Simply expressing an opinion. I understand an opinion from an employee of the law firms would be a problem, but a campaign worker?
Put another way, I assume an opinion expressed by myself would be OK. If at some point I become a volunteer or paid worker (not happening) would the gag order apply to me. That seems like a stretch. Just asking, I understand that’s not happening here, it was Trump’s comment.