Hi Kim!
Where are you wanting these different logos to display?
All our plugins, including Events Tickets and Events Tickets Plus have templates that can be overridden for the various views, emails, etc. You could certainly customize any of these to display different images based on things like event category, tags, etc. However, this is not something that is built into the default settings.
Check out our Themer’s Guide to find out more about customizing our plugins.
Let me know if this answered your question, or if you have any others.
Thanks,
Sky