how to sum up filters on the same column (server-side)

pankus

Dear Allan, first of all I would like to express my gratitude for this amazing project.
Now, since long my project operated without a server side interface, but at present the data I deal with have increased substantially and I must switch to server side processing. Since I worked locally, I use a mix between text inputs and ColumnFilterWidgets plugin to filter my data by columns. This is a working example:</br>
Local: http://liber-dev.isma.cnr.it/a_ebda/test_data/index_local.html</br
Server: http://liber-dev.isma.cnr.it/a_ebda/test_data/index_ebda.html</br
The only feature I cannot replicate with the new interface is the ability to sum up filters of the same select (apparently a ColumnFilterWidgets' feature). This is extremely important for my project, since I need to filter data which do not share any common attribute.
As far as I know the ColumnFilterWidgets does not work in a server side environment. Isn't it?
Is there any solution to replicate such a behavior?

thanks