"Verified User" in WP ClassiPress?

Question

WordPress

Hi guys!
Managed to solve the previous ones. It remains to solve the following question: the theme is the same (ClassiPress), you need to make such a filter at the top to display the filter "Sell", "Buy" and also "All".
Second. To query-lo on those us. items, most likely the filter covers the tags "buy, sell, all".
Third. And finally, how to make a "Verified User" form? So that a person can check the box during registration or have such a button in their personal account. Then it is necessary that verified users are displayed on the ad (search) page with an asterisk.
The site is located here http://gorodselo.rf