Does Cloud4Wi provide a Whitelist to allow certain MAC's / IP addresses to pass through?

Yes it does, however, you must configure the whitelist on the access point / controller. On our support center page you can find all the instructions about the URL that needs to be whitelisted to allow specific services:

• Social Login: https://cloud4wi.zendesk.com/hc/en-us/articles/200537836-Walled-Gardens-for-the-Social-Login-web-sites-domains-to-open-
• Online payments: https://cloud4wi.zendesk.com/hc/en-us/articles/200537896-Walled-Gardens-for-PayPal-feature-web-sites-domains-to-open-