Can I create 2 types members, one type with privilege of use all modules services(forum, nexus, calendar, blog, gallery and download) and other type only can use forum?

You can setup up "Member Groups" and then set permissions based on what you want them to see. In other words, yes.

I can make a group can *see* or not e.g. the nexus, but how I can make a group can *use* nexus function?

I mean they can put product to sell...like a contributor here.

I can make a group can *see* or not e.g. the nexus, but how I can make a group can *use* nexus function?

I mean they can put product to sell...like a contributor here.

​.

 

You can all do that with permissions for different groups .. no problem ..

same as here.

 

.