Partitions

This is what we need may be you need different solution recommendation;

a user has to enable disable some nodes and that node also has to be member or different partition so same machine has to accesed by another user but that another user should not access the other nodes that first user has extra access

node 1 - usera - userb node 2 - userb

So how can i setup that usera only controls node 1 on list and userb only controls node 1 and node 2. So If i can not do this with partition seperation how can i do it?