AFAIK there are no such reports, I haven't worked a lot on PCA, but I doubt it will report that, in the way you want it, specially because the products have no way to tell if you're at your desk, or not. How do you expect the product to know you're on a break????
You can only get a real time status via IM&P reporting, in the Presence Usage report.
There are devices that allow you to monitor work/break time for workers using a small device in which you record the time by pressing buttons, but this obviously depends on the worker doing this .
HTH
java
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