Not exactly the same. Lamont would be more like banning propaganda on all social media. Which would obviously not fly. Requiring certain ownership of media is actually already the law for radio and TV so it seems to be permissible.
But radio and TV are not the Internet. We don't and should never require local ownership of all important Internet platforms. That would crush the very globalism the Internet has been built up for so many years to sustain
This doesn’t really seem germane to what is going on here though. An individual subscribing to mail is quite a bit different to Chinese spyware tracking and propagandizing citizens (without their knowledge or consent).