Customize filter condition in FLEXIcontent - Content Lists Filtering

I want to customize filter condition when I choose category from 'FLEXIcontent - Content Lists Filtering' module.

hello can you explain more ??

If any category is selected from filter, it displays items belongs to that category. I want to add some more condition to select items when any category is selected.

Hello

you can display more field filters

There is a problem in selecting a category..when any category is selected, it shows the items of selected category for a very small time (1 sec), after that it displays all items. Why does it change the items...??

Hello

you mean the filtering options of the filters ?

The drop-down selectors are multi-value ,
they appear with their normally unstyled display (HTML select-multiple form field) for a second
and then they are styled via Javascript

the above effect is due to a delay that depends on the overall Javascript of your page