Manufacturers and operators have the ability to add apps either when devices are provisioned or via separate app stores.
You'll need to work with the manufacturer to set this up.
This is normally done for apps they've developed themselves or have some kind of exclusivity deal with the app. They don't have public ways for developers to request this.
There's no way to release an app in the store and make it only available to specific devices. I've seen a few apps that are intended for only a few devices with comments in the store description to indicate this but there's no way to stop people with other devices installing - and inevitably leaving bad reviews.
Why would you want to limit your potential user base anyway? Especially when non-Nokia devices are less than 10% of the market anyway.