If i am publishing a NSNetService in (Bonjour based NetWork) Iphone Application,which net Work will use in my application
If you use the high-level NSNetService methods, (on both OS X and iOS) the NSNetService will be published through any network interface that supports multicast packet transport. Since bluetooth supports this, you should be able to broadcast mDNS data over a PAN, although service advertising and discovery may be slower than on a normal IP network. Have a read through this for more information.