View Connected Configuration Manager Console Information
Beginning with Configuration Manager current branch, version 1602 it is now possible to see a list of active connected Configuration Manager consoles. At this stage there is no built in way of seeing historical information, but you could archive the information periodically using PowerShell if that is the sort of information you are looking for.
The active list of consoles connected can be viewed by querying the v_CMConsoleUsageData table in SQL.
Select * from v_CMConsoleUsageData
Here is an example of the information provided:
| MachineName | BLCM01.breenlab.scottbreen.tech |
| UserName | BREENLAB\breens |
| ConnectedSiteCode | B01 |
| ConnectedSiteNumber | 1 |
| OSMajorVersion | 6 |
| OSMinorVersion | 3 |
| OSBuildNumber | 9600 |
| OSType | 18 |
| OSProductSuite | 400 |
| OperatingSystemSKU | 8 |
| OSArchitecture | 64-bit |
| OSLanguage | 1033 |
| ConsoleVersion | 5.0.8412.1307 |
| TotalPhysicalMemory | 4291858432 |
| NumProcessors | 1 |
| NumLogicalProcessors | 1 |
| CMClientVersion | 5.00.8412.1000 |
| CMConsoleInstalledLangPacks | CHS,CHT,CSY,DEU,ESN,FRA,HUN,ITA,JPN,KOR,NLD,PLK,PTB,PTG,RUS,SVE,TRK |
| NetFx40InstallationStatus | 1 |
| NetFx45ReleaseVersion | 378675 |
| NetFx45Installed | 0 |
| NetFx451Installed | 1 |
| NetFx452Installed | 0 |
| NetFx46Installed | 0 |
| NetFx461Installed | 0 |
| IsColocatedWithSiteServer | 1 |
| IsColocatedWithProvider | 1 |
| ConsoleConnectTime | 12/09/2016 00:34 |
There is a corresponding SMS Provider WMI class called SMS_ConsoleUsageData, but querying this object currently returns no results.
Given the data is available in the database via SQL, you have plenty of options for querying and displaying the information including SQL Management Studio, SQL Reporting Services, or PowerShell. I've done up a quick PowerShell script to query and display this information if you are interested. The ConsoleConnectTime attribute is stored in UTC format, so my script adds a new attribute called ConsoleConnectTimeLocal which is converted to the time zone of the computer the script is running from.
Download the script here: Get Configuration Manager Connected Consoles (Script)
Example command line: 
Example output: 