In your example 'ps -ef | grep netscape' resulted in:

sskb 2430 2429 0 22:55:51 ? 1:35 /usr/local/netscape/netscape
sskb 2508 2507 0 23:14:39 ? 0:09 /usr/local/netscape/netscape

In the first line, the PID 2430 represents the PID of the running task 'netscape'. Now if you do a ps on the Parent PID (PPID):

ps -ef | grep 2429

you'll find the owner of the task netscape. -mk

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