Problem:
How to prevent guests (anyone not registered) from accessing/seeign the content either as a post or in a view
Solution:
Then you need 2 steps:
1. Access:
You can hide with access single posts, forms, fields and taxonomies, or just part of Post Contents
2. Views
Views can't be controlled by Access.
That means, a View's list would still be visible to any user, only once the user clicks on the SINGLE post title he would trigger the Access Settings.
In Views, you can use conditional HTML where you check the current User's status, name or role.
In this case you can just check if the user is logged in, if not, hide the content
What you can also do, is to wrap your View (when you insert it into a page/post) into a Access Group Rule, so you can hide the entire View with a certain group.
This Custom Access group has permission settings for every role, so you would set the "Guest" no not being able to read this, and they should therefore not see the page you set under Access Group control.
You can also just wrap the Views ShortCode in a Access Condition, thats also done with the Access Button in the editors of posts / pages.
You can there as well tell WordPress to hide certain content from certain roles.
Relevant Documentation:
https://toolset.com/documentation/user-guides/#access
https://toolset.com/documentation/user-guides/conditional-html-output-in-views/
