Unless the government decides to ban all cryptography, or forcefully install their own certificates on every device, it should be possible to avoid any restriction attempts. If they're doing deep packet inspection to detect specific protocols, then those can be tunneled via encrypted protocols they do allow, such as TLS or SSH. This is certainly more inconvenient to use, but not impossible.

If they're blocking all traffic beyond their borders, then that's a separate matter, but usually such restrictions are more annoying than absolute.