I don’t know how it would work in North Korea, but I think an easy solution would be to use the Tor browser. Is that allowed, though? By “allowed,” I mean: can a person download the Tor app and use it to access online casinos or browse other websites? Or is that also forbidden by the North Korean government? Because when you combine Tor and cryptocurrencies, you basically have total freedom anywhere.
afaik it is totally illegal to use Tor or VPNs in North Korea. Also only the elite few could access to internet, if you were not elite they will restrict your access various way. I have heard they allowed on state-controlled intranets only for ordinary citizens. One of my tourist friend told me they closely monitored his internet activity and warned him that any attempt at anonymizing tools will immediately arouse suspicion. So merging Tor and bitcoin to gain complete freedom sounds interesting, but in real life, it seems to me high risk and almost beyond the bounds of possibility under the DPRK's surveillance-heavy regime.
In projects like these, it's most likely the country's official and sanctioned hacker team that's doing the work. Like they do with hacking, profits go straight to the Kim Jong Un after they are laundered.
And this would even play well with their ideology there they see gambling as degenerative act to the nation. And there's nothing they wouldn't like better then harming the south. Even if in reality it would be only minor problem clashing with South Korean laws.