Restrict Android Market Application By Location

I've read that it is possible to restrict an application that you submit to the Android Market by country. Is 开发者_开发技巧it possible to restrict users from downloading your application by state in the United States?

Unfortunately, no; you can only restrict by country.

I may be wrong but I pretty sure there is no way to do that. The question would be what kind of parameters a wireless carrier would use to identify unique states and how it can be made available to Android platform and thus to developers. There is no easy way to do this.