I want to make the questions and answers portlet using the Liferay MVC Framework

In this portlet anyone can anonymously post a programming related question, but the answer can only be given by the logged in user with permission. Any way of doing this by using portlet from Liferay Library.
For example:
Anyone anonymously can post questions. Only people have authority can see and answers unanswered question in the queue. Only the answered question by permitted the user appeared on the page. Anyone can post questions and answers like here one can post .
Kindly reply with your suggestions

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