Yes, if you have two smartthings accounts AND two iftttt accounts, rather than two locations on one account, You can expose all the devices. The Question is can you set up rules with some devices for each location. Which comes down to some specific details and also gets complicated.
I’m not feeling well today so I will have to leave it to other people to go through the different options. You can get some background by looking at the how to article in the community-created wiki on automating an outbuilding, although it’s not exactly the same as the use case you’re describing, but some of the techniques will be the same.
On the other hand, are you sure you need IFTTT for this and you can’t just use the built-in smartthings features? @tgauchat might have more to add on those options.