AFCEA is concerned with cyber security as it relates to defense, homeland security and intelligence communities. Chapters are spread throughout the world, but, as you might expect, there are a lot of groups in the Virginia and Maryland regions.
As CSA puts it, members are usually composed of a credible group of cloud security experts for the region. Chapters are located around the globe and must have a minimum of 20 CSA members.
Focused on the advancement of technology, IEEE Technical Chapters contain members from one or more IEEE Societies/Technical Councils who share technical interests and geographical proximity. Chapter events include guest speakers, workshops, seminars and social functions.
InfraGard is a non-profit, public-private partnership between U.S. businesses and the FBI. The idea is to share intelligence to prevent hostile acts against the country. Members of local chapters meet to exchange info on the latest threats and listen to talks from security experts.
ISACA is one of the biggest networking organizations, with 200+ chapters worldwide. Chapters sponsor local educational seminars and workshops, conduct IT research projects and provide members with a number of leadership training opportunities.
(ISC)² puts a lot of effort into its program. Chapter members can receive special discounts on (ISC)² products and programs, earn CPEs by participating in professional activities and participate in local community outreach projects (e.g. cyber security education
Like ISACA and (ISC)², ISSA has a strong chapter network. In addition to regular chapter activities, ISSA has created a Chapter Leaders Summit and a number of Special Interest Groups (Women in Security, Security Awareness and Healthcare).
Unlike other programs which require membership, OWASP chapters are free, open to all and managed by a set of universal guidelines. Many OWASP presentations are available for everyone to use at meetings. OWASP Community Members can request funding for a variety of chapter initiatives on the Funding page.