How many laptops are you trying to track? The closest report is the Client Session report, but I don't believe it will do exactly what you're looking for. If you can flesh out more details about what you're looking for, it would make a good feature requests.
In the meantime, if it's less than a dozen laptops, then you should make use of the watched clients list. You first need to visit each laptop's client detail page, then update it to be a watched client. After that, the watched clients will appear in a list when you visit Clients -> Overview (Keep in mind that watching all clients is not the appropriate use of this feature. This feature is used to track clients of interest - perhaps VIPs or power users or clients who report the most issues to help with proactive wireless troubleshooting). You can compound the watched list with the connected clients alert trigger, that way you can get an alert when a user is online to see how their wireless connection is compared to previous connections.
1) search for client username or mac
2) go to client detail page
3) update to watched client = yes
4) save
The client detail page will have the history of health, signal, usage - along with graphs.