1. A method for mapping a user in a heterogeneous network comprising: receiving on a computer in a first network a user name associated with a user in the first network wherein the first network uses a first operating system; mapping the user name to a user name associated with the same user in a second network wherein the second network uses a second operating system and wherein the first operating system and the second operating system differ; and mapping the user name associated with the user in the second network to a user identification number associated with the user in the second network.