Please, is possible add Check owner?

You're gonna have to elaborate.

Example.
you go to the car and look at the car. and type:
/doc

He sees the car document.
whose car is.

So far, I do not think it would be ideal to add that to this plugin, because ownership is a concept that exists independent of this plugin. Meaning, multiple plugins could set an owner, and to multiple types of vehicles. Perhaps a standalone plugin would make sense for this feature.