The article explores the process of implementing multi-tenant functionality in an application using Clerk Organizations, focusing on a to-do app as an example. Clerk Organizations allow users to create isolated areas within an application with the ability to set granular permissions based on roles, which is essential for B2B applications. The guide walks readers through setting up a project using an open-source starter kit, configuring a Neon database, and integrating Clerk's organizational features to facilitate task sharing among team members. It explains how to modify database queries and update code to enable users to switch between personal and organizational accounts, ensuring tasks are correctly associated with the selected organization. The article highlights the benefits of Clerk Organizations in creating collaborative environments and encourages readers to explore further by building upon the demonstrated example.