var namedInjector = ObjectFactory.GetNamedInstance<IInjectable>("Other");

.ForRequestedType<MementoType>()
.AddConcreteType<ConcreteType>(instanceName)

class MyRegistry : Registry {
    public MyRegistry() {
        this.ForRequestedType<IFoo>()
            .TheDefaultIsConcreteType<Bar>()
            .AddInstances( x => {
                x.OfConcreteType<Blap>().WithName("abc");
            });
    }
}
...
ObjectFactory.Configure(x=>x.AddRegistry<MyRegistry>());
IFoo test1 = ObjectFactory.GetInstance<IFoo>(); // Bar
IFoo test2 = ObjectFactory.GetNamedInstance<IFoo>("abc"); // Blap
...
interface IFoo {}
public class Bar : IFoo {}
public class Blap : IFoo {}