Yes you absolutely can order food from Domino’s (near Estancia), Papa Johns’ (located on the service road at Thailavaram) and from McDonald’s (at MM Nagar). I’m not sure about KFC though.
If you place an order for Home delivery from any one of the above Restaurants, the delivery guy will either come with your order till the Arch Gate or till the Hostels area gate (the place in front of Paari Hostels where the Flipkart guys sit). However note that they aren’t allowed to enter completely inside (ie. till your respective hostels).
For hostellers residing at BC Roy, Began, Sannasi and Pierre Fauchard Hostels, you have come down and wait in front of your Hostel and the delivery boy will be coming there to deliver your order.