Can I create multiple bars with different shipping goals to different countries?

Yes, it is available in the premium plan. For example, if you want to have:
Bar 1: Offer free shipping within U.S. for orders over $100 dollars
Bar 2: Offer free shipping worldwide for orders over $200 dollars

This is how you do it:
Create Bar 1 with Unite States in the "Geo Target", Bar 2 and leave its "Geo Target" empty.
In general, the App prefers and displays the Bars with explicit geo target configuration over the generic ones. Therefore, if visitors from the U.S. visit the website, the App displays Bar 1; if visitors from other countries, the App displays Bar 2.

Note: You do not need to select all the countries except U.S. for Bar 2, just leave the "geo target" blank.