Yes. Users can connect to shared information through a variety of means.
Using the AppleShare workstation software yields the most consistent
results. File sharing, Novell, 3Com, and other vendors support the
AppleShare workstation software. Other vendors that don't support the
AppleShare workstation software can coexist with AppleShare solutions.
However, once shared, folders accessed with the AppleShare workstation
software cannot be "re-shared" with Macintosh File sharing. Macintosh File
sharing only lets you share locally connected folders.
For more information, contact the individual vendors of your network setup.