The easiest way to achieve this would be to use server filtering, as shown in this demo
where on the server you can handle the filtering in the way you need it. If you want to use the client filtering side filtering, then you will need to create a custom dataSource, that will inherit from the Kendo UI one and override the filter method, so you will achieve the desired filtering functionality. But you need to keep in mind that we will not be able to assist you with this as it falls outside the scope of the standard support services and the built-in functionality.
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