Collision object recognition

Is there any way that an object can recognize a specific object it's colliding with, say, by the other object's name and then perform a specific action if it has collided with that object?

Ok, so here's an example:

Object A collides with a normal object - nothing happens
Object A collides with a specific object...one named 'john', for example - an event happens

However, I'd like it also to recognize the creator of the specific object, so the event won't happen with just any object named 'john', just the object 'john' that was created by me.

You can use llDetectedName to find the name of the object you collided with, as long as you call llDetectedName while processing the collision event (i.e. not on a timer later, or a listen, or something).

I don't think there's a direct way to find out who created a detected object.

If the owner is in the same sim, you can use llKey2Name(llGetOwnerKey(llDetectedKey(n))) to get their name. If they're not, though, you'll have to know their key and use llGetOwnerKey(llDetectedKey(n))... which should be okay if it's just you you want to filter for.