Here are a couple of other ways to ask this question: What is Android's equivalent to Apple's vpp (volume purchase program)? What is Google Play's equivalent to Apple's vpp (volume purchase program)?
Right now I am distributing apps using Apple's b2b program that allows me to restrict who can download an app. I give the user a unique URL, from that URL they are able to download one copy of my app.
I would like to do the same thing using Google Play.
I want to distribute using Google Play rather than downloading off my site because I do not want to have the user be bothered with changing their setup to allow downloading from unknown sources.
Google has something called "Private Channel" http://support.google.com/a/bin/answer.py?hl=en&answer=2494992 . From reading the documentation it seems that this program is targeted for companies that are in control of their user's email addresses.
I need to handout download codes to users with existing accounts that I do not control.