The visa office that is reviewing your file and where your file ie transferred will depend on the kind of application being processed, where it was submitted electronically or in paper format.
For an Express Entry Application the following applies:
1. Central Intake Office - The R10 (completeness check) is done at the Central Intake Office for all classes (FSW / PNP / CEC). Now even the criminality and medicals are done at CIO.
2. Case Processing Centre - These are 4 CPCs in Canada
CPC in Edmonton
CPC in Mississauga
CPC and CIO in Sydney
CPC in Ottawa
OSC in Ottawa
The Operations Support Centre (OSC) processes the following applications:
International Experience Canada work permits
In-Canada temporary resident applications submitted online
Verification of Status (VOS)
Replacement of valid temporary resident documents
Amendment of immigration documents and of valid temporary resident documents
Local Visa Office - This is the office where you will be asked to submit your passport after your application has been approved. Usually the consulate in your home country.
These days all application after starting at CIO (where R10 is met), either start the processing of eligibility at CIO itself, or move to CPC (wither Ottawa, Sydney, or Vegreville), or are straight sent to the LVO. The trend has been to complete most of the processing between CIO and CPC. Since the applications are electronically stored, there is no movement of physical files.
However, if it is spousal sponsorship, the it will start at CPC Mississauga. After most of the processing is done, the application will be transferred to the Local Visa Office where the sponsored person resides to complete eligibility and initiate security. The transfer can be done even before eligibility or after eligibility.