@Zhmak Unfortunately that graph does not exist on a per-client basis. In terms of real-time, the statistics on each client should be in real-time, and you can push notifications or events through Webhook or Email Notification based on that. 

If such a graph is required, I recommend you submit a feedback to our Requests and Suggestions module. 

  @Zhmak 

You can get a Top 5,10,15 and 20 clients traffic report graph in the reports page, but i dont really know how anything more would be manageable since there could potentially be hundreds of clients all popping on and off the network at different times