Go to WiserNotify dashboard
Create any notifications and if you've already created the notification click on edit
Now, navigate to display section
Here, under segmentation, you'll see an option for country based targeting
Turn it ON and you'll see two option Display/Hide
Now, lets say you want to display notification in USA, and hide it in Canada. Add these details in the given section
That's it. Now save it.
Your notification will only be displayed in USA and will be hidden in Canada