To answer your question, yes you technically can, but you may find a monitor script easier (I haven't used one as I'm new to this vROPs stuff).
You'll have to use sigar to see what the agent sees but yes you can technically do it. You can refer to this post here or use my cheatsheet down below.
Trying to monitor Linux OS process / Error: Object is not available
Note that this'll have to be done for each instance of the process you're monitoring and I'm not sure if these Ppid's are permanent.
1. Get the Ppid using sigar (post above)
2. Create a new Monitor OS object > Monitor Processes
3. Create a unique name
4. Replace State.Name.eq= with State.Ppid.eq=
5. Enter the Ppid at the end
6. Adjust collection interval as necessary
7. Wait 5-10 min or so
8. Profit
Sigar Ppid cheatsheet
ps -ef | grep process_name_you_want_to_monitor
#grab the pids
cd AGENT-HOME/bundles/AGENT-VERSION/pdk/lib
java -jar sigar-VERSION-NUMBER.jar
pinfo pid #repeat depending on the number of pids
#grab the Ppid for each
I hope this helps.