capabilities - Read For Learn

Vistors usually always have the rights to access a post. Only exceptions that I know are drafts, password protected posts or post_types that are not public accessable. You could use get_post_status() and post_password_required()

Disabled delete_others_posts if post is from admin

Edit and delete permissions pages and posts

Restrict access to custom post type based on its taxonomy terms

You should be able to check the conditions and add capabilities like this: if(wp_get_current_user(‘gallerist’) AND ‘cats’ == get_post_type() AND has_term( ‘status’, ‘age’ )) { $gallerist_role = get_role( ‘gallerist’ ); // Adding a new capability to role $gallerist_role->add_cap( ‘custom_capability’ ); } I am sorry I can not test it but I think it is a start