To show all the posts submitted by all users in a page, follow the instructions given here.
1) Create a new page, insert [wpuf_dashboard] shortcode in that page & Publish it.
2) Add the following code inside the theme’s functions.php file.
GeSHi Error: GeSHi could not find the language php (using path /home/mahbktbn/public_html/wp-content/plugins/codecolorer/lib/geshi/) (code 2)
Now, logged in from multiple users account & submit posts using frontend form, check the page you created on the frontend. You can see all the posts submitted by all users on that page.