The compliance server endpoint is usually deployed under the same IIS website, which means it's the same port and so forth. It's a different service that the LCM calls. The PowerShell team blog recently included a post with more detail, including how to query the compliance server.
But, keep in mind that the whole compliance server functionality is, at present, undocumented. It's unclear if it's fully intended for production use at this point, which means it's unclear if Microsoft's thought through all the permutations, yet.