Thanks for your contact.
One single regular license is for the one single live URL only, this is Envato Policy and with all the themes on the ThemeForest, you may wish to confirm from them as well. You can read the Envato license policies here: https://themeforest.net/licenses/standard
And further you can read our theme documentation based on the license here: https://www.portotheme.com/wordpress/porto/documentation/how-to-register-porto/
Hope this helps.