If you wish to show your Hello Bar on specific Countries, Cities and Region/State only, it is definitely possible by using Geo targeting rules.
If you are already on our Paid plans (Growth, Elite) then you can use these rules.
Simply navigate on your Popup Editor under "Targeting" Menu then click on "Create New Targeting Rule"
Then select the Geo- targeting rule you need.
You can set the following to trigger on specific City within a State and Country.
Within a Specific State/province only
Or in a Specific Country only.