Explore a groundbreaking framework for flexible and granular multi-user access control in shared Internet of Things (IoT) environments. Delve into FLUID-IoT, a system that transforms existing IoT apps into centralized hubs capable of selectively distributing UI components based on user permission levels. Learn about the framework's performance evaluation, covering aspects such as coverage, latency, and memory consumption, and discover how it seamlessly integrates with existing IoT platforms. Gain insights from an in-lab user study demonstrating the intuitive and user-friendly nature of FLUID-IoT, requiring minimal training for efficient utilization. This 15-minute conference talk, presented at CHI 2024: The ACM CHI Conference on Human Factors in Computing Systems, addresses the growing demand for sharing IoT devices among multiple users and offers a solution to the limitations of current IoT platforms' all-or-nothing approach to access control.