I found a cheater and he got banned .if he buys a new account .Is that he will be banned with “linked account”?

Can I find his new account by the  Ip address he logging into origin（older account)?

Omg dude, I told you.
You cannot, and we do not share this information. If you are interested, become a patron and have some benefits, if not nothing you can do, but feel free to report if any accounts you think are linked to another.