If you want to show some columns only for login users, you can do it very easily. Click and expand that column and you will show an option "Only Login user" just check it. So now the user can't see that column until he/she login.
Here I am going to explain that when you checked "only login user " then your user can not see this column until they are login but if you want they see some message like the screenshot below :
Then you have followed this step I explain below:
Step one: Go to Configure settings and scroll down and Active the Show or hide column for guests Option and save. see this screenshot below:
That's it. now your users will see the Login message on the column.