Networking Question

I need to be able to have my laptop users log onto a domain while they are in the office, but when small groups go to the same client I need them to be able to have access to each other’s laptops as well as share a single printer. My thought was topurchase a 5 port hub and by using hardware profiles, configure a profile to use while at the office and another to use while at a clients’. However the network settings will not stay with any one profile. In other words, when I change the networksettings to reflect logging onto the domain at work, the network settings for the Clients’ profile also changes. Does anyone know of a workaround for this? We need to be able to use the same NIC for each scenario.
Thanks,
Dana Wanner