Win 10 split sound / headphones this movie that?

Is there a program with which you can output the sound separately bz. In Win10 ne setting?
eg. Game over headphones and mistress looks series netflix and that should then be output via the monitor's sound

or do you need to be able to do so ne separate sound card?

WINDOWS 10 has no resources for this because the assignment of what is to be output to where does not exist.