How do I change the "Source IP" of ClientWebSocket and HttpClient (GET, POST) in C #?

Question

I am using a VPS server with several white IP addresses. I need to make connections to the server using HttpClient and ClientWebSocket that has a command processing limit set.
How do I change the source IP in the HttpClient and ClientWebSocket classes? So that I can increase the amount of requested commands per unit of time.
I connect to Poloniex / Binance (in the first and the other, the limit on the number of requests is 6 per second).

alas i am using .Net Framework 4.7.2