@tcallis
Could you post image or give us link to u r domain?
@grezom
Please understand , if users are logged in and answering questions , then based on users log in session and user id and user name the plugin can store individual user details and show usernames instead of “Anonymous”.
I guess you just want a user to fill username and the username should be shown with the answer , in that case
Customize the answer form , add one more field for name , save the value to db along with answer and customize code to show name instead of Anonymous.
Refer dwqa ask a page , when anonymous users ask questions it shows email field and saves the value with question.