This is not possible, if you could do that, the whole Windows security system would be useless.
As soon as the user has access to the first elevated process, he could start many other elevated processes and do anything on the machine.
The whole point of being a standard user is to not be able to do certain things.
Just keep your elevated command line open and run programs from there, or use a different elevated launcher, that means you are only asked for the admin password once per session.