The Customer Management plugin allows you to define customers, customer groups and services and associate them with issues.
There is no formal release for now and the latest version from the repository is not yet ready for production use. Early adopters are however encouraged to take it for a spin.
To report an issue or feature request for CustomerManagement plugin, visit Mantis BugTracker, Plugin - CustomerManagement.
The CustomerManagement plugin is hosted at GitHub along with other plugins at https://github.com/mantisbt-plugins/customer-management .