Hi!
Normally after your case goes in process with Ecas stating" Your application was reviewed and we started processing on " then if you send an email or case specific enquiry, your program assistant dealing with your case replies to you directly. You can see the initials normally a 3 digit alphabetical code "RIH,CKL,LBM" etc at the end of email and you can also see program assistant written there. Please note that these people RIH,CKL,LBM are not your actual immigration officers, they are junior officers called program assistants who follows instruction from a senior officer (immigration officer) and they only do the initial preliminary review or all the communication with applicants.
I have also seen one thing that for those people who received 6-12 months wait letter and sent an email / CSI they did not receive a reply directly from a program assistant but client service unit. So in your case if you send an email you might not get a reply from program assistant but client service unit.
