All information coming from database, like CommSessions, EDIINT, OFTP Queue, BP list, etc. are coming in System time.
IBM Sterling Integrator is used as Global EDI system in more companies, having support 24/7, users from around the globe, but it is not possible to setup the time zone per user, and show the results or filter entries in her local time zone.
This could be stored in the user profile.
Same is valid for date/time formats. If the server is sitting in US environment, you cannot get German, Japan, Hungarian or other date/time representation. In 2015 it is common in most of the integration products.