You can require the local user to give permission to any person trying to log in remotely.

1. Connect to the host computer.
2. Click Preferences.
3. Click General Settings.
4. In the Host side user's consent, check the box beside Request consent from host side user.
5. Check the bubble next to Reject Request (this will require access to be granted in order for a user to Remote Control the machine).
6. Click OK at the bottom.