That's what happens when a lawyer designs IM/conf app. Follow your design, the switches/routers need to confirm the "jurisdiction" of each TCP/IP packet? What wonderful idea, please do submit your RFC to IETF.

> but about jurisdiction. For calls where no participants' connections originate from a PRC IP block, don't use the PRC infrastructure.

That's basically where the Chinese got the idea of building the Great Firewall started. Some IP addresses are from evil capitalist USA and need to be filtered.