i think there is a registry fix/tweak you can do to
tell LDD that it's a network copy and not standalone.
not sure what thread this tweak was mentioned in, but i'm sure it's searchable.
i have used similar fix to convert a standalone install of cad to network. as sometimes its quicker to do an install off a cd , rather than pull the network deploy off a network server.
should be as simple as editing the registry and, copying the licpath.lic to the correct folder.