ASP.Net Security By Route

Question

I'm working with ASP.Net Dynamic Data and I have a section in my web.config like this:

<location path="Foo/List.aspx">
  <system.web>
    <authorization>
      <allow roles="The Name of Some Role"/>
      <deny users="*"/>
    </authorization>
  </system.web>
</location>

This works fine for restricting access to that path, however later I'll want to restrict access to similar paths like "Bar/List.aspx" (Every time I add a new table in Dynamic Data there will be a new similar path) It would be nice if I could use a regular expression here, but I don't think I can. I think the solution is to tweak the routing to where Foo and Bar fall under the Role1 path like Role1/Foo/List.aspx and Role1/Bar/List.aspx

So I'll want to change the code that registers my routes to something like this:

routes.Add(new DynamicDataRoute("{role}/{table}/{action}.aspx") {
    Constraints = new RouteValueDictionary(new { action = "List|Details|Edit|Insert" }),
    Model = DefaultModel
});

Two questions:

1. Would you solve this problem with routing like this? Or would you do something different?
2. Assuming this is a good way to do this, how do I get Dynamic Data to map URL's to routes like this? I think ideally I'd like to decorate my models (I'm using LinqToSQL) with attribute tags designating the roles that should be allowed for each one.