The instruction in the form is as clearly stated below......
List all trip you, and if applicable, your family members have taken outside your country of origin or residence in the last years(or since your 18th birthday if this was less then 10 year ago.)
a) You
b) Your spouse or common-law partner
Family members in IRCC context refer to you the PA, your spouse or common-law partner, and any PA or spouse dependants (i.e., children).
2.A ......should be trips by PA (i.e., person been sponsored)
2.B ......should be trips by Sponsor (i.e., PA spouse or common-law partner)
You need all travels outside your county of origin or country of residence.
1.) If you are in your country of origin list all trips you have taken outside your country of origin.
2.) if your country of residence is other than your country of origin list all trips you have taken outside that country, even to your country of origin.
Yes.......a sponsor who is a Canadian citizen living in Canada should to fill out part B of the form
The sponsor who is a Canadian citizen residing in Canada should list all trips taken out of Canada.