It’s possible to implement only by additional customization. This service is not included in our support but you may contact WPKraken team to get help with this.
You need to edit content-portfolio.php, portfolio-slide.php, portfolio.php files (http://prntscr.com/gqainf – add similar code but for tags), and edit functions (etheme_get_recent_portfolio, etheme_create_portfolio_slider, get_etheme_portfolio).
