Pulling logs from devices in my network, how can I create a table showing if and which users are logged in to these devices?

I am pulling logs from the devices in my network and I would like to know if it is possible for Splunk to show on a dashboard, whether or not a user is logged into it. Perhaps this can be displayed in the form of a table. For example it could list the name of every device and in another column show if/which user is currently logged in. Any help would be massively appreciated.