Board Thread:In-Editor Help Assistance/@comment-2600:1700:D6E1:1A20:E540:9F52:ABB:DF5B-20190913000024/@comment-34888194-20190913001033

That's not a username, that's an IP address. When you are editing the wiki without signing in, your IP address will be used as the editor of the wiki, instead. IP address change when you are using another network or used a proxy or a VPN. Anon users cannot "replace" their IP address with a custom name. The only way to do that is to register or sign in. Signing in also hides your IP address.