Collaborative Networks realization fundamentally relies on the need of collaboration among involved partners. From the supporting ICT infrastructures point of view, an increasing movement has been observed in direction of the development of applications based on the Service Oriented Architecture paradigm as a way to maximize reuse, to minimize integration efforts and to augment processes' adaptability. The underlying motivation of this paper is the possibility of CN members to enlarge their collaboration sharing software services. This means allowing that available services can be accessed by any member so enlarging and reinforcing collaboration while development and hosting costs are decreased. This paper presents an approach, in the form of a reference guide and based on Software-as-a-Service (SaaS) model, that helps both CN clients to be more confident when accessing services from CN members, and to CN members to have a support on how their services should be properly developed and made available to CN clients.