A method and network device for tagging network traffic flows. Specifically, the method and system disclosed herein entail the incorporation of static user-defined tag information, as well as dynamic screener-defined tag information (if appropriate), into flow tracking information exported from flow tracking-capable network devices to one or more flow collectors. Incorporation of the aforementioned tag information enhances the ability of the flow collector(s) to index, as well as retrieve, the flow tracking information. Through enhanced indexing and retrieval, speedier analysis of the flow tracking information, by one or more flow analyzers, may also be possible.