Attendeeslist sorted by Ticketname

sorry but are you using Attendee Form by EMpro? also, this might need custom coding on your part to make this work and modify template file under events-manager/templates/placeholder/attendeeslist.php

to use templates: http://wp-events-plugin.com/documentation/using-template-files/

this snippet is for EMpro using Attendee Form and maybe this can give you a good start – http://pastebin.com/3ysQrDii