I don't think that's possible because how would you then express this as a metric? You could create a scripted way to make a monitor per process but collecting multiple objects and representing them as a single object I don't think is going to work for you.
According to the reference guide for vROPS 6.5
On page 104-105, it says you can get Microsoft Windows OS Metrics
What do they mean by that if it's not a list of in OS running processes and their CPU usage?