DLC, like TCP/IP, IPX, etc. is a network protocol. Sorry to say I've never seen DLC on the Amiga. (And, it's mostly abandoned, according to Wikipedia it's no longer available in Windows even.)
Edit: You might be able to re-share the printer out using Unix printing support. I know it's possible on 2000 Server, not sure about Professional. It should be listed as "Other File and Print Services" or maybe Unix printing in the Windows components list.