Yes, you can control privacy permissions in your account on a per-content-item basis. Here's how:
- Login to your account.
- Click the Content tab, then click the title or the Manage link for the content item whose permissions you want to modify.
- Click Permissions.
- Click Change.
- Click Private.
- Select the groups and/or users that you would like to be able to view the content item.
- Click Save.
Now only the users or groups who have access to your User Portal or the URL to access this content item will be permitted to view it.