1. A computer-performed method for connecting to remote procedure call (RPC) programs in a computer system coupled to a network through multiple network interfaces, the method comprising: receiving a request for a network address to an RPC program from a prospective RPC client, wherein the request includes a response address of the prospective RPC client; identifying, from the response address, an identity of a particular one of the multiple network interfaces through which the prospective RPC client sent the request; in conformity with the identity of the particular network interface, determining an address of an RPC application that is accessible to the RPC client over the particular network interface and that provides the RPC program specified in the request; and returning the address of the RPC application to the prospective RPC client in response to the received request.