Using mocks/virts when running ready api!/soapui NG in bamboo

No haven't used bamboo.

If there is any specific issue, then that would help better.

ReadyAPI /SoapUI is used by many people in Jenkins. It looks like Bamboo more richer software, so I am under impression that it should be possible.

Coming to your case, all you might want to run a batch script (may have different OS) to start the mock which can be called from terminal and am sure there must be a way in the build process of Bamboo too.