Login option

I have installed Disqus on my website http://www.dreamhomeguide.in where I found that the readers can comment by logging in through Disqus, Facebook,Twitter and Google only. I just wanted to know that can a reader, who is registered on my website, post his/her comment by logging in to my website only?

https://ww.wp.xz.cn/plugins/disqus-comment-system/