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  • If there is different content being served up on each of these urls and they are different sites in your multisite setup, w3tc should work fine.

    If you are showing the same content on the different domains (based on your description, I think this is what is happening), the cache is stored based on the url, which is different for each domain name. Publishing new content will clear cache on one domain, but not the others.

    You really don’t want to have this setup anyway. If all three of those domains are showing the same content, you’ll want to redirect two of them to one main domain. Showing the same content on multiple domains can cause all kinds of problems from a search perspective.

    So have both https://www.example.org and example.org redirect to https://www.example.com. Now if you make a change, it will be on https://www.example.com, cache will clear, and any traffic to the other domains will see that changed page.

    Hope this helps!

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