Hi. I wonder if it is possible to hide some hotspots from users. explanation : I need to set up a contribution map, and i need to set up three groups of users.

In those groups, users can submit hotspots, but i need hotspots to be shown only to specific users.
I tried with categories restrictions and users groups, but i need a "per hotspot" permissions setting.Is it doable ?
The best would be to select the users who can see the hotspot, one per one.
Thanks for support, regards . Thomas.