The adoption of Aspect Oriented Programming (AOP), and in general, of more sophisticated composition models is a recent trend in software engineering to address the problem of the correct modularization of cross-cutting concerns. However, most of these models are not well-suited for the particular conditions, scale and complexity of the problems inherent to distributed systems. This paper outlines a minimum set of desirable criteria for an aspect oriented model for those systems. We study some problems with existing models and propose a solution inspired by the actor model with aspect mobility and controlled invasiveness.