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To apply filtering to two data using PHP Object Oriented Programming, you can create a filter class that takes in two data sets and a filter criteria parameter. The filter class would have a method to apply the filter to the data sets.

Here's an example of how you could implement this:

class DataFilter {
    private $data1;
    private $data2;

    public function __construct($data1, $data2) {
        $this->data1 = $data1;
        $this->data2 = $data2;
    }

    public function filter($criteria) {
        // apply filter to data1
        $filteredData1 = array_filter($this->data1, function($item) use ($criteria) {
            return $item > $criteria;
        });

        // apply filter to data2
        $filteredData2 = array_filter($this->data2, function($item) use ($criteria) {
            return $item > $criteria;
        });

        // return filtered data
        return array($filteredData1, $filteredData2);
    }
}

// usage
$data1 = array(1, 5, 7, 10);
$data2 = array(2, 6, 8, 9);

$filter = new DataFilter($data1, $data2);
$filteredData = $filter->filter(5);

// $filteredData contains array( array(7, 10), array(6, 8, 9) )

In this example, the DataFilter class takes in two data sets ($data1 and $data2) in its constructor. The filter method applies a filter to both data sets based on a criteria parameter. The example uses a simple filter that returns only items greater than the criteria.

The filter could be modified to accept more complex filter criteria, and the example could be expanded to use other filter methods.