Yes, the qa_get_logged_in_user(...) function you define in qa-external-users.php can provide information on the Q2A privilege level of the logged in user. Please see the documentation in that file for more details.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, 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.