How does one unlink multiple objects? If i have 10 linked (instanced) objects, how do i make 5 of them local (non-instanced)... 

The result would be two sets of 5 objects. Each set of 5 would be linked respectively. 

I'm coming from 3ds max so my terminology might be off.
If you are using 2.79 you select the objects and hit U this will bring a menu for unlinking objects with options like object, data, animation, materials etc. If you are using 2.8 you can find under the menu "Object" in 3D view