Major I have noticed that the badge for UserID causer correctly resolves with name as configured on the Jenkins People page. However, if the cause is CLI, then this does not occur. I have attached examples of this.
[JENKINS-18824] Build Causer doesn't resolve CLI based usernames
This has nothing to do with the "Build Trigger Badge Plugin", but with the implementaton of CLI. The CLI cause does seems not contain the correct information.
-> hudson.cli.BuildCommand.CLICause.getShortDescription()
Code changed in jenkins
User: Nicolas De Loof
Path:
core/src/main/java/hudson/cli/BuildCommand.java
http://jenkins-ci.org/commit/jenkins/6b4331b1c53da418373d6ed739d43f63d2e37f95
Log:
[FIXED JENKINS-18824] Pass actual username to CLICause
Integrated in 
jenkins_main_trunk #3619
[FIXED JENKINS-18824] Pass actual username to CLICause (Revision 6b4331b1c53da418373d6ed739d43f63d2e37f95)
Result = SUCCESS
Nicolas De Loof : 6b4331b1c53da418373d6ed739d43f63d2e37f95
Files :
- core/src/main/java/hudson/cli/BuildCommand.java
Code changed in jenkins
User: Nicolas De Loof
Path:
core/src/main/java/hudson/cli/BuildCommand.java
http://jenkins-ci.org/commit/jenkins/3efe07f563d30a38cf405a20c9145c3ea88e5051
Log:
JENKINS-18824 prevent failure when startedBy is ‘unknown’
Integrated in jenkins_main_trunk #3620
JENKINS-18824 prevent failure when startedBy is ‘unknown’ (Revision 3efe07f563d30a38cf405a20c9145c3ea88e5051)
Result = SUCCESS
Nicolas De Loof : 3efe07f563d30a38cf405a20c9145c3ea88e5051
Files :
- core/src/main/java/hudson/cli/BuildCommand.java
I have revised my initial bug report because this information is not displayed correctly in the console log either.