Read this article if there is a library for the queue and ultimately cancel the async operations in WCF. This may be useful in your case.
If you plan to create monitoring tools, you can host WCF services using the application infrastructure on Windows Server. Appfabric provides an IIS extension that you can configure to track and log WCF calls to the SQL Server database and monitor the control panel in the IIS admin console. More details here and here .