Enable searching on columns altered with mRender

JerryRig

I have a table that has server side processing. I'm using mRender to turn 2 of the columns into links. This is working fine. The only problem I have is, once they are turned into links I can no longer search for them. Is there a way to enable searching on those columns? Here's my code.

    $("#FailedLoginLogTable").dataTable({
        "serverSide" : true,
        "processing" : true,
        "bServerSide" : true,
        "ajax" : {
            "url" : "serverSideProcessingFailedLogin.php",
            "data" : {
                "EPFunction" : "Login",
                "Flag" : 2,
                "FailedLogin" : true
            }
        },
        "aoColumns" : [
            {"sTitle" : "Date"},
            {"sTitle" : "IP", "mData" : null, "mRender" : function(data, type, full){
                return "<a href='ipoverview.php?ip="+data[1]+"'>"+data[1]+"</a>";
            }},
            {"sTitle" : "User Agent String"},
            {"sTitle" : "User Name", "mData" : null, "mRender" : function(data, type, full){
                return "<a href='useroverview.php?user="+data[3]+"'>"+data[3]+"</a>";
            }}
        ]
    });