Digital Government (traditionally known as e-Government) focuses on value delivery to citizens through information and communication technology (ICT) support for processes, activities and resources. Digital government's collaborative processes involve organizations (employees, technologies), partners (providers, consumers), and users (citizens, foreigners), leading to complex interactions within different e-Government models and available technologies. Business Process Management (BPM) constitutes a real asset for enhancing the services of an organization and their coordination, as well as the products that each actor of a virtual network delivers to meet clients' expectations (citizens, patients, etc.). Successful interorganizational process management within e-Government collaborative organizations will lead to better conceptual and technological integration, not only with each other but also with citizens and users in general. To this end, it is necessary to devise new ways to deal with the complexity of e-Government collaborative process definition, modeling, analysis, enactment and monitoring from various dimensions and points of view including theory, engineering, interoperability, agility, social aspects, etc.