Hello, Miroslav.

Firstly, I would like to sincerely apologize for the delayed response as we have been experiencing an unusually high number of tickets. I am sorry that it has taken longer than usual to respond to your concern and your patience is highly appreciated.

- We would recommend Google Analytics as the best option, but mixpanel is also a great choice.

Please contact us further if you need anything else regarding this.

Hi, Miroslav

- Sorry about that, I didn't understand exactly what you needed at first.

- We don't store the data which the user inputs into the filters; that data is being passed to the server(if it is a server-side table), 

or passed to the database engine(if not server-side).

- Every filter has its own logic, if you wish you can see that in this JS file :

wp-content/plugins/wpdatatables/assets/js/wpdatatables/wdt.columnFilter.js

- That being said, something like this perhaps might be done with some custom solution

but is not part of our technical support for the plugin.

We can recommend reaching out to WPKraken, but we don't know their prices for custom work.

Apologies that we are not able to help you fully construct a solution for this.

Hi, Miroslav.

Thank you very much ; 

I will pass this to our developers, to have it handy when the opportunity to help someone with this arises. Or if someone searches for it in public tickets, they will find it here.

Thanks again for the contribution.