Select object in runtime

How do I...?
1

Have game with four insyances of same object. In runtime how, or can, select a single instance to move or shoot?

2

When you create that object set an object variable like OBJ_ID = someValue and set one of them to “MoveMe”

Then inside a condition just check
if Object.VariableString(someValue) = “MoveMe”
if press Left simulate control left
if press Right simulate control right
and so on…