Thank you for the additional information.
When using a Custom HTML block to render a table, the queries and query areas of the configuration allow you to define the data sets to be included in your data table, and you can use ctx variables within these queries to better refine the data sets that are included in your table.
However, as I understand it, your particular use case requires you to develop this filtering within the code block itself. To perform this you will need to write your own custom Javascript code. I don’t have any specific examples to point you to within Losant.
There are some great resources out there to help navigate and develop using the Javascript language:
https://eloquentjavascript.net/
Thanks,
@Aidan_Zebertavage