With the pro version of the plugin, users can create posts from front-end formidable forms. So if I am understanding your question correctly, yes, you can create a page on your site where users can post content/articles to.
It should be doable. We do offer a 30 day money back guarantee to allow you to try it out to make sure it works with your setup. I haven’t used buddy press with Formidable pro so that is one variable I can’t promise will work. Best thing to do is purchase and try it. If it won’t work, you can contact us for a refund.