With FamilyAlbum Premium, you can create custom Share Groups and make a photo/video only viewable by members of a Share Group. (Only parents can view and change visibility settings.) For information on FamilyAlbum Premium, please check the link below.
FamilyAlbum Premium
https://family-album.com/premium
To create a new Share Group, tap the up arrow button on the Add screen and tap "+ Create Share Groups".