First of all, thanks for this beautiful plug-in which is very useful for amateur photographers and others.
This topic is written to ask the plug-in author if he have planed to add a function to protected for albums or galleries : a restricted access for some part of the ngg. For another website, I use the UAM plug-in, which allow to restrict access according the group you are signed-in. Unfortunately, this great plug-in is not "compatible" to NGG.
So, this is a dream, my wishes to the great plug-in NGG.