Log User Proxy

I’m trying to find a way to log users real IP if they are using a proxy server. I don’t necessarily want to block them, but I would like to see if users have sock accounts and reviewing products to skew results. I can’t find a way to do this in WordFence though in reading reviews it seems like it should. Can this be done in WordFence?

https://ww.wp.xz.cn/plugins/wordfence/