Unless you meant where if you had two objects with the same script, could you access the variables in one from the other? Which as far as I can tell, is impossible., as variables are entirely private.
Not exaclty, i meant if two references of the same base object with an assigned script, have also referenced properties, so another script can access and modify (by get/set functions) the referenced properties (not the variables) and not the base object's ones.
Two other questions:
1- To create a global variable there is a menu in the CK that i didn't see, or the first time u declare it in a script, it will be globally created?
2- How do u point the object to which is assigned the current script? can't find the function
Thanks for patience, i'm trying to better understand the CK

(and i'm a little rusted on ObjOriented programming)