@Chadrick are you trying to filter the Notes table by JobCandidateID? If yes you can try data-binding the DataGrid to getNotes and set the $filterparameter to JobCandidateID eq ${parameters.JobCandidateID}.
This assumes the current page is generated by Radzen where ${parameters.JobCandidateID}.
If you need further assistance please send us the meta directory of your Radzen application to info@radzen.com