Modern simulation environments require advanced tools for real-time data visualization and interactive analysis. This paper presents LiveOppServation, an open-source Dash-based frontend for OMNeT++ simulations that enables continuous runtime monitoring and visualization of simulation data. Our system addresses limitations in traditional post-processing approaches by providing three key capabilities: real-time evaluation of vector data with timestamps, automatic generation of live visualizations, and conditional data-based breakpoints for targeted event analysis. Built on gRPC and Protocol Buffers, the architecture supports scalable many-to-many mapping between simulations and frontends, allowing simultaneous monitoring of multiple simulations or collaborative analysis of a single simulation from different perspectives. The design emphasizes flexibility through modular components and extensibility for integration with other simulation platforms.