you can set your syslog fillter to this:
%date% %time% - %node% - [%sourceip%] %user%(%realm%)[%role%] - [%userAgent%] - %msg%
the "userAgent" string will be included on the IVE web requests :
Are you looking for from here-forward or existing/already on-device? If you are looking for data already on the system, making changes now may not have it now (I do not believe it is there).
Or are you looking for from here forward? You can create a new filter, as mentioned by @xfiquet, and set that as the default. Or if you do not need this on-device, you can set it as the syslog filter and still have on-device view that does not have it by default. (Pushing the log off to syslog is good as you can then create the report.)