Hello David Ocasio,
Unfortunately answer to your questions is no indeed. In order to use Validating events in such asynchronous case you could provide some proxy classes (view model pattern). These proxy classes you can validate using EnterpriseLibrary.ValidationBlock. The main advantage of the Validation block is that you can change validation rules on the fly (just update config file when data base validations are changed and restart the application).
the Telerik team