Does ClearTrigger support HCL VersionVault? YES
ClearTrigger Supports both ClearCase by IBM and VersionVault by HCL.
ClearTrigger was initially created to support ClearCase 3.2 (as introduced by Atria Software) through the latest versions of ClearCase (introduced by IBM) as well as all versions of VersionVault (as introduced by HCL).