RetrieveMultiple not fired for incident entity plug in when user selects views (my active cases,all active cases view etc)

Hi All:

I have a requirement to filter out special cases(incident) (hippa flagged cases) from all crm views for  specific Bu and roles.

I have written a plug in which fires on PreCreate event for incident entity on RetrieveMultiple message.But the plug in is not getting fired.

The dotnet plug in contains logic to check the BU and roles associated with the current user and based on that appropriate Query filter is appended.

I tried Prevalidation,Post event also. it is not working as well.