Hello community

I would like to know if there is a way to restrict everybody to all sites, except one domain. Let's say, google.com. I want everybody to get only to google.com and all their subdomains. I did something like that combining parental control and whitelisting, with good results. The challenge I am facing now, it's how can I restrict anybody when using the guest network, or any other user in the network that I did not add their mac address to the parental control list. Is there a way to do what I need? Thanks!