Specify form location URL: "click Add to specify upto five location URLs"?

Specify form location URL: "click Add to specify upto five location URLs"?

Hi there,

In https://www.zoho.com/crm/help/web-forms/set-up-web-forms.html#Specify_Form_Details you specify that we can add upto five location URLs with a ADD button, wich I can't see.

I have a multilingual site with 4 languages with 4 diferent domains, all of theme in the same wordpress theme with the same Zoho CRM webform. I want to limit the location URL to avoid spam upto this 4 urls:

htts://gesvalt.es
htts://gesvalt.com
htts://gesvalt.com.co
htts://gesvalt.pt

How can I do this without duplicate the webform?

Thanks.