Only view author’s posts

Will this app allow me to only show a post to those logged in and to no others?

One is logged in and being directed to a single blog post:

https://example.com/custom/my-post

I don’t want this person to be able to see any other posts, like:

https://example.com/custom/your-post … if they try to see any /custom/*** post they will see an error message.