How To Restrict Someone On Facebook
When you add a buddy to your Limited List, they will not see any of your future posts unless they are tagged in the posts or the posts have a "Public" personal privacy setting.
Here's the best ways to add users to your Limited List in the Facebook mobile application. Note: These screenshots were captured in the Facebook app on iOS.
Action 1: Go the profile of the user you want to contribute to your Limited List. You can get there by looking for the user by hand, or by tapping on their name on a post or comment they've shared.
Action 2: Tap the "Pals" button under the user's name.
Action3: Tap "Edit Friend Notes."
Action 4: Scroll to the bottom of the list, and tap "Limited" to add a check mark to this row.
Before:
After: