TThrottle allows the BOINC client to use a non standard port.
Go to the BOINC tab and fill the port the client is using after: On port(s) 31436 (example)
Or running multiple BOINC clients on the same localhost.
Go to the BOINC tab and fill the ports the clients are using after: On port(s) 31416;31426;31436 (3 clients in this example)