<aura:handler name="change" value="{!v.filtreNameText}" action="{!c.filterChange}"/>
<lightning:input class="CASE" name="input2" value="{!v.filtreNameText}" />

filterChange: function(component, event,helper) {
    var Nametxt = event.getParam("value");
    var Nametxxt = event.getSource().get("v.name");
    var Nametxxxt = event.currentTarget ;

    console.log(Nametxt+ " " + Nametxxt + " " + Nametxxxt);

}