Who did you talk to? You need to contact a conservation officer, preferably one that works in the area you wish to fish, and ask them about the regs. If you call the local fisheries office, the person you talk to may or may not know. You could have been talking to an intern or a technician. Unless they do allot of fishing, they wouldn't be able to answer your question, nor should they. They should have given you the number to someone who could though. That's on them.
To answer your original question-No. That would be illegal. Daily limit is 2, it's 2 regardless of the area. Now if you were fishing in an area that had a limit of 2 hatch coho which was near an area where the limit was 4 coho, you could catch your limit of 2 hatch coho in the 2 limit area then travel to the area where the limit is 4 and catch two more.
I would not suggest fishing an open area for a species, catching your limit, then fishing a different species in a different area that's closed for the species that's in your possession. Usually that's illegal. I don't live in BC, so I can't say for certain, but I've fished many areas in North America and normally, it's completely legal to launch in a zone that is closed to a species then travel to an open zone and fish/catch your limit. Once that limit is obtained you normally aren't allowed to fish in a closed zone with that species in possession. You'd have to travel through the closed zone back to the harbor without stopping to fish.
I will say, there's sure allot of complaining about regulations being too complicated on here. As someone that's only been out there one time, and planning to come out again, I haven't found it to be that difficult to figure out the fishing regs. The website is hard to navigate, but I think the regs are pretty clear.