There is no direct translation of cmd.exe on tha Mac, since cmd.exe is only a shell that allows you to enter DOS commands under Windows. It is similar to the Terminal for Mac OS X in that it's simply a shell with which to enter the command-line interface of the respective OS.
DOS commands are incompatible with Mac OS X -- they're two, completely different operating systems, and thus the commands are different. There may be something similar to "netuse" under Mac OS X (UNIX)... if you could explain exactly what netuse does, perhaps we can point you to a similar command-line program under Mac OS X that you can execute from the Terminal.