Tor’s Snowflake system uses a browser extension for Chrome or Firefox to create proxies to Tor bridges to route around censorship in countries that block access to Tor guard services and Tor bridges.
Oppressive regimes can and have blocked the IP address of guard servers and bridges, but the idea with the Snowflake proxies, as Catalin Cimpanu aptly summed it up for ZDNET is to,
. . . create a constantly moving mesh of proxies that no government could ever block.
If someone from Iran or China or another country does use your Tor Snowflake proxy to connect Tor, their traffic will run through your Internett connection. However, the Tor Project notes,
There is no need to worry about which websites people are accessing through your proxy. Their visible browsing IP address will match their Tor exit node, not yours.