Hi there,
It can go both ways. For me my file was at Ottawa and PPR was issued from ottawa, but it was mentioned in the PPR e-mail that i should send my PP from the nearest VFS to my Local Visa Office (New Delhi) for stamping. So for sure they will tell you to send your PP to local Visa Office for stamping.
In some cases Ottawa candidates have received PPR from Local visa office to, recently a friend of mine got, again she just got the e-mail form LVO though her file was approved at ottawa and was instructed to send her PP to LVO.
So in both cases, nothing to worry as IMO they will mention in the e-mail to send PP to your LVO. PPR e-mail has clear instructions where to send the PP, so all good