As mentioned in the session, provided your deployment and user has the Query capabilties, the 9.5.11 Fixlet Debugger can query remote computers in a similar way to using the local client
The announcement at BigFix 9.5 Patch 11 is now available mentions this.
Accelerate fixlet creation and testing by using the FastQuery interface in Fixlet Debugger
Fixlet Debugger is extended to use FastQuery interface in addition to Local Fixlet Debugger Evaluator and Local Client Evaluator. You can choose a remote endpoint to evaluate relevance.
For details, see https://developer.bigfix.com/tools/fixlet_debugger.html