Is there an easy way to run multiple test responses at once

I am setting up test cases and have a scenario where a JMS message I send triggers multiple SOAP requests to come in. I can add a test step to host a mock response, but if the requests come in in a different order than my mock hosts, the test will just hang.

Do I need to write a groovy script to handle the responses or is there any way for me to, essentially, set up multiple responses all to be active at once, and then move on once they've all been executed?

Thanks