Hi jkoelker,
You can try running a custome report. Selected options should be Client session: Session Data by device-SSID(list) and Client Session: Top Clients by Total MB used by Folder. You can refer the below screen shot for the definition.
Output for the report would be as below,
There are 2 ways you can run the report specific to an AP. One is as mentioned yesterday, provide the AP name in the field Device Search Filter when we create a report definition,
Or we can go to Aps/devices page where the AP is listed. Click on the pencil icon to edit. Select the particular device from the list. Select the device action as Run report on selected device from drop down and hit on run report. This will take you to the report definition page and filter would be selected to this device. Here you can specify the same definition as mentioned above, only difference would be device filter would be already set to that partifular AP. In the report definition you would also have the option to specify the date and time range for which you need to run the report.