Board Thread:Support Requests - Getting Started/@comment-26382471-20150707001748/@comment-5558012-20150707003108

Simple answer: yes, you can. Keep in mind though, some wikis do not allow the same user to have multiple accounts so one may be blocked if they find out (even if you don't cause trouble with them). Participating in discussions/votes with both accounts could also create problems. Personally, the only real reason to have another account is for a bot.