When you upload a candidate's CV, you can select who out of the users that have access to Jobs can see the candidate and which jobs they are linked to.
This access can be amended at any time. To do this, open the candidate tab and click on the green cog icon next to their name, then select access.
You can then add users to the candidate's visibility by searching their name in the search bar or remove them by clicking the x next to their name.
Click save when done.