The easiest way to be more selective, is to generate a random number, md5 it and pass it along as a dummy parameter. I've done that by wrapping the target server program in a perl script, and simply ignoring it. When I have to kill the thing off, i check the process list for that random number so that I kill less things off. I also have the perl script on the remote server kill itself off in reasonable time in case someone yanks a net cable.