Example? Netgear WNCE2001.
I'm unsure why you are switching LANs here. Almost no printer today will connect to more than one LAN. However any IT staffer worth their cred can set up a print server for collect print jobs from many LANs. Sorry but such setups are not something I go into here. Pretty techy stuff.
Bob
I have a 20 yo (that works like a champ) Hp Laser Jet 4000N with ether net card that I cannot physically connect to my primary WAN/LAN router (unless I run cables through walls/ceilings, etc.) I currently have the printer connected to a wifi router but I have to switch networks to the internal LAN to print. I have looked at DD-WRT and bridging but it is confusing and I am not sure it addresses my problem. I want to put the HP on my main wifi network. Any ideas appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic