On the client side, you’ll have to add a form (so the client can enter the filter values) and some javascript code that triggers the AJAX reload.
There is an example here in the pdoPage documentation.
On the server, you’ll have to add a &where property to the pdoPage call and create a snippet that generates the value of this property from the request parameters.
Something similar to the example here.
(Maybe you could also use the extra FilterWhere for this.)