I had a doubt in my profile. So I called customer care IRCC and asked where my VOs are at. They clearly mention what your primary and secondary visa offices are.
Or you can raise a webform -
https://secure.cic.gc.ca/ClientContact/en/Application
Also, biometric request from the Sydney office is highly common in all applications and most of the communication is thru primary office which makes us believe that our application is being processed at Winnipeg but it is not completely true.
Winnipeg is primary VO office that communicates to you but it is the secondary office which is actually processing your application. (use google to verify what primary & secondary VO do)
You get to know the VO only to assume how fast/slow your application is moving. Other than that, primary & secondary VO information is least needed.