Can use I TCommander Bot on one server with several memberships (multiple accounts) using private proxies?
Yes. You can run multiple instances of bot program and each instance with differnt game account connected to the same game server.
You have to use proxy to use different IP and simulate being in different location per each bot program. In order to do so you only need to login with a proxy per each bot program. Here you can learn How to login with proxy
We can suggest using this reliable proxy provider: https://fineproxy.org/
Although you can use the proxy provider of your choice.