Filters questions

Not tested but something like this

// Add cat id as body class
add_filter( 'body_class', '_my_cat_body_class');
function _my_cat_body_class($classes){
    
    if(is_tax() || !empty($_REQUEST['spost_category']) ){
        $tax_id = isset($_REQUEST['spost_category']) ? absint($_REQUEST['spost_category']) : get_queried_object_id();
        $classes[] = 'catid-'.$tax_id
    }

    $classes;
}

The above will add a class per category to the body so you could then use CSS to show/hide each filter somthing like,

body.catid-123 .geodir-filter-container .gd-field-special_offers,
body.catid-321 .geodir-filter-container .gd-field-special_offers{
display:none;
}

Thanks,

Stiofan