universal Containers UC maintains multiple customer-facing sites, but only one profile for all customerusers.

To grant access to each customer to only one site, UC should create a permission set and select a permission set for a given site. A permission set is a collection of settings and permissions that give users access to various tools and functions. UC can create a permission set for each site that specifies the site access and the object permissions for the customer users. UC can then select a permission set for a given site in the Experience Builder, which will assign the permission set to all new and existing users of that site.