The administrator of the NetCommunity website needs to make the fields available for edit and then the user needs to log into their form to make their desired changes. 

To determine which fields should have Privacy Edit:
  1. As an administrator, log in to the NetCommunity website and edit the Profile Form part
  2. Under Profile Fields, select the Section to Edit from the dropdown
  3. Mark the fields you want to include and mark Privacy Edit for the fields you want the user to change the Privacy of
  4. Click Save
Steps for the end user to change their privacy settings:
  1. Log in to the NetCommunity website as the linked user between Raiser's Edge and NetCommunity
  2. Access the Profile Form
  3. Mark or unnmark the Private box
  4. Click Save or Update when finished
    • Note: you may be prompted to enter a password to confirm your changes
Note: if the field in the Profile Display should not be visible to any user at all, you may consider removing the field from the Profile Display part:
  1. Edit the Profile Display part
  2. Under the Design tab, Formatting subtab, remove the merge fields which contain the data which should not be visible
  3. Click Save
Note: There is not a way for supervisors to log in and make this change for users. This is for security purposes. 

Additional Resources
How to make directory or profile fields public or private by default
How to change visibility of directory fields
How to set privacy as an individual