What technological measures do you propose to block Tor and VPN services to achieve this? Not even China's Great Firewall completely achieves this, though not for lack of trying.
https://support.apple.com/en-gb/guide/deployment/dep28afbde6...
To do TOR you would need to look at the IP protocol and signing at the packet level. Definitely more difficult.
Decentralized platforms tout not doing this stuff as a feature. You'd have to roll out the attestation system and require everyone running a web server to set up this attestation infrastructure; that is, the small guy running a model train forum on his laptop or whatever must risk prison time if he doesn't do attestation. That'd be so draconian that afaik not even China does it.