AppleShare's copy protection feature was put in as an aid for Macintosh
users, and it built on an old feature of the Macintosh file system. MS-DOS
is not even aware of our copy protection bits, so there is no way to get a
COPY command to respect this level of protection without being extremely
intrusive into the operating system (and causing a good chance of
incompatibilities with future operating system releases).
We don't know of a way to keep DOS users from copying applications from the
server while still having access to run the program.
One solution is to distribute applications to the individual users who need
them and use the file server only for data.