Netflix users can have up to five profiles within a single account. To restrict access to a specific profile, protect it with a Profile Lock PIN.
Sign into Netflix through a web browser. Click on your profile photo; go to Account > Profile & Parental Controls > Profile Lock > Change; enter your account password. Check the box ‘Require a PIN’; enter four numbers to create a Profile Lock PIN.
The next time you enter Netflix, your profile will appear with a lock under it; tap on the profile and enter the 4-digit pin to open it.