bbPress.org

It is definitely possible, to do so you will have to modify the template ‘content-archive-forum.php’
you could use a custom loop to loop through the topics you would like to display based on the user role.

Example:

<div class="Featued">
    <?php
    //get current users user role
    $role = bbp_get_user_display_role(get_current_user_id());
    //if role is keymaster,moderator or participant display topics
    if ($role == "Keymaster" || $role == "Moderator" || $role == "Participant") {
        ?>
        <!--begin loop-->
        <?php
        $args = array('post_type' => 'topic', 'posts_per_page' => 10);
        $the_query = new WP_Query($args);
        if ($the_query->have_posts()) :
            ?>
            <!--the loop-->
            <?php while ($the_query->have_posts()) : $the_query->the_post(); ?>
                <div>
                    <a class=”bbp-topic-permalink” href="<?php bbp_topic_permalink(); ?>"title=”<?php bbp_topic_title(); ?>”><?php bbp_topic_title(); ?></a>
                </div>
            <?php endwhile; ?>
            <!--  end of the loop-->
            <?php wp_reset_postdata(); ?>
        <?php else: ?>
            <p><?php __e('Sorry, no posts matched your criteria.'); ?> </p>
        <?php
        endif;
        ?>
        <?php
    } elseif ($role == "Guest" || $role == "Blocked") {
        //do nothing
    }
    ?>
</div>

It is not very complicated depending on your level of expertise, but will require some knowledge of php and wordpress. If you could provide more information regarding what you are trying to achieve or any areas you are facing difficulty with, I can try my best to help out.

To find the location of the template files navigate to:
‘wp-content/plugins/bbpress/templates/default/bppress/’

You will find all the template parts in this folder. It is recommended to not modify the files directly, instead create a folder named bbPress in the ‘generatepress’ theme root folder. ie. ‘wp-content/themes/generatepress/bbpress/’ copy any files you wish to modify into this folder. This way updates to bbPress wont overwrite any files you have modified and your changes wont be lost.

Test this by copying the content-archive-forum.php to the newly created bbpress folder and begin to modify the file.

a simple php echo command will confirm it is working by printing a message at the top of the content-forum-archive template.

<?php echo "Hello world!"; ?>

The Example provided in the previous reply can be pasted on top, or wherever you would like to display the topics. Some formatting is required, by adding appropriate div classes and styling with css as necessary. Would be happy to help with any of the html, php or wordpress functions if there is any difficulty.

*my apologies if this a duplicate reply, previous reply did not get submitted properly,spam protection may have blocked it, since it included links to screenshots on imgur.