Disable citrix receiver startup on login
The following services are are started at login by launchd 

/Library/LaunchAgents/com.citrix.AuthManager_Mac.plist
/Library/LaunchAgents/com.citrix.ReceiverHelper.plist
/Library/LaunchAgents/com.citrix.ServiceRecords.plist


You can use launchctl to stop the processes like so

launchctl stop com.citrix.AuthManager_Mac


However I am currently unable to prevent launchd from autoloading these services through launchctl.  It is irrelevant because the Citrix Receiver App will not start those services when it starts and will therefore not work if they were stopped or disabled.

I did notice these services are unneeded if using the the companies web app.  Considering that one can just delete the above .plist files and only use the web app.