The man page for top has tons of info.

I am not sure if this is what you are looking for, "YMMV" but part of it says:
(the quote below is taken from "http://unixhelp.ed.ac.uk/CGI/man-cgi?top"):
       -p : Monitor PIDs as:  -pN1 -pN2 ...  or  -pN1, N2 [,...]
Monitor only processes with specified process IDs. This option
can be given up to 20 times, or you can provide a comma delimited
list with up to 20 pids. Co-mingling both approaches is permit-
ted.

This is a command-line option only. And should you wish to return
to normal operation, it is not necessary to quit and and restart
top -- just issue the '=' interactive command.
HTH,
--
Mike Schwartz
Glendale AZ
schwartz@acm.org

On Thu, Jul 31, 2008 at 1:31 PM, Patrick C <patrick.pxc.c@gmail.com> wrote:
So back to the thread title, how can I monitor the various processes? I currently use ps and grep to look at them, but I'd really rather have some more information in a self-updating list, like top. Here's the ps/grep line that I use right now.

pxc@cista:~$ ps -ef | egrep '(wesnoth|nexuiz|tremulous|pvpgn)' | egrep -vi '(screen|grep)'
109       5166  5165  0 12:43 pts/3    00:00:06 /usr/games/nexuiz-server
trem-srv  5614  5613  0 13:13 pts/2    00:00:07 /usr/lib/tremulous-server/tremded +set dedicated 2 +set fs_basepath +set fs_homepath /var/lib/tremulous-server +exec server.cfg +set net_ip localhost
110       5690  5689  0 13:23 pts/4    00:00:00 /usr/games/wesnothd -c /etc/wesnothd.conf

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