I need to be able to target multiple markets with one campaign - and not all markets. I have this post descriping the problem:
After speaking with Khanh Pham from your support team about it, I have created this issue to be able to make dependency injection for ShippingMethodSelectionFactory and GetCampaignsByMarket, so that is is possible to complete the feature.Or alternativly make the feature so that it is possible to select multiple markets for a campaign - the code for it is quite simple.
It is also possible to write a custom promotion that is available for all markets but that have a custom condition with checkboxes for which markets it is viable for.
Just thought i should mention it if you wanted to work around it for the time being.