I don't believe that's true - I think that the Googlers who leaked the memo went to some extent to not name the author publicly, and his name was first posted on Vox Popoli, in fact, by someone sympathetic to him. (Once the name was public, everyone started using it in public.)
Also there's a big difference between "dox" in the sense of "identify a name" and "dox" in the sense of "post lots of personal documents / records about," which is what Kiwi Farms does.
Also there's a big difference between "dox" in the sense of "identify a name" and "dox" in the sense of "post lots of personal documents / records about," which is what Kiwi Farms does.