OutputCache varying by a complex object property

I have a controller action that receives a complex object as a parameter, I need the OutputCache to vary by one of the properties of this complex object. Is this possible? How?

if you have a model like

public class person{
 public string Name {get;set;}
 public string location {get;set;}
} 

and in the (strongly typed)view you have a form

 @model Person

 @Html.BeginForm(){
  @Html.TextBoxFor(x=>x.Name)
  @Html.TextBoxFor(x=>x.location)
 }

and you submit the form to an ActionResult savePerson, with varying signature like

public ActionResult savePerson(Person p){
 // p.Name
 // p.location

}

or

public ActionResult savePerson(string Name, string location){

}

therefore i think if you annotate the ActionResult like

[OutputCache(Duration=3600, VaryByParam="Name")]
public ActionResult savePerson(Person p)
{
    //
    return View();
}

it will do for you, or if you have a complex model like

public class person{
 public string Name {get;set;}
 public Location loc {get;set;}
} 
public class Location{
  public string address
}

try

[OutputCache(Duration=3600, VaryByParam="Person.Location.address")]
public ActionResult savePerson(Person p)
{
    //
    return View();
}