Have a look at labels in Wix Support for contacts:
https://support.wix.com/en/ascend-by-wix/contacts
Plus, here is the API info about contacts:
https://www.wix.com/corvid/reference/wix-crm.html
Or by setting member roles:
https://support.wix.com/en/article/creating-member-roles-6943237
https://support.wix.com/en/article/limiting-pages-on-your-site-to-specific-members-member-roles
https://support.wix.com/en/article/contributor-roles
Here is the API info about user roles:
https://www.wix.com/corvid/reference/wix-users.User.html#UserRole
https://www.wix.com/corvid/reference/wix-users.User.html#getRoles