1. A method for routing streams of Internet Protocol (IP) traffic in IP networks or in mobile IP networks, the method comprising: routing a plurality of streams of traffic to be transmitted in such a way that they are transmitted utilizing one carrier or context, merging and transmitting several different streams of IP traffic comprising packet data for different destination networks from a terminal via one carrier/context to a network access node of the IP network, assigning the terminal only one IP address for transmitting the several different streams of IP traffic to the network access node, and wherein the transmission of the several different streams of traffic takes place in the method regardless of whether they must be differentiated with regard to destination network, and configuring rules and filter criteria for statically or dynamically controlling a local network access node of the IP network by its own network or by another network, the rules and filter criteria being used for controlling routing and filtering of the different streams of IP traffic in the IP network.