Hi,
If you exclude anything from caching it could work. The problem is that caching & Geo Blocking do not work well together unless you do the Geo Blocking at the cache level.
In the best case scenario countries or IP’s you want to block get served a page from cache and when visiting non cached pages they get blocked. This is due to the fact when pages are served from cache the iQ Block Country plugin does not get started and can’t do it’s job.
If the caching plugin however ignores the caching headers you risk the chance that the block message gets cached and everyone gets to see they are blocked even the countries that you did not block.
If you’re fine with blocked countries getting served the page from cache then you’re fine using the iQ Block Country plugin.
If you’re not you should disable either the cache or the Geo Blocking. Or search for another solution outside WordPress (for instance by using the Varnish software) where you can GeoBlock at a caching level.
