I want to create private categories and items for each of my clients. I am a photographer and I want to have a client login and only be able to acces their private category (along with all the main website content) and not another clients category. How do I achieve this?

Hi,

what about a UserGroup for a Category?

Regards

Exactly,

You can use Joomla!'s ACL to assign categories to other access levels.

Thanks.