public class FooAttribute : Attribute {}
public class BarAttribute : Attribute {}

public interface IA { ... }

[Foo]
public class FooA : IA { ... }

[Bar]
public class BarA : IA { ... }

public class B {
  public B([Foo] IA one, [Bar] IA two) {
    Assert.That(one is FooA);
    Assert.That(two is BarA);
  }
}

Bind<IA>().To<FooA>();
Bind<IA>().To<BarA>();