Yes you can. There are various ways, you can use device tokens or subscribed channel or even based on any other column in the installation object.
For a start, you can use the Push Composer option provided by Parse.
Checkout these for more information:
https://parse.com/docs/push_guide#top/iOS
https://parse.com/products/push
http://blog.parse.com/2011/07/18/targeted-push-notifications/