Yes. The difference is that you no longer sign-in in the QA site, but in the WordPress, where you can use a social plug-in, just like the Q2A's plugin.
Take a look at these wordPress plug-ins:
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.