Based on the knowledge sources provided, there is no explicit information stating that you can directly filter Flows reports by events with a specific tag. However, it is mentioned that in the Events Menu (used for adding metrics or selecting steps in reports), you can filter events by tags if you have organized your events using tags in Lexicon. When you select a tag, a list of events that share the same tag appears, which may help you select relevant events for your Flows report, but this is not the same as applying a tag-based filter within the Flows report itself Events Menu.
Therefore, while tags can help you organize and select events when building reports, the knowledge sources do not explicitly confirm that you can filter Flows by events with a specific tag after the report is built.
