Hello,
I found your job posting and I think I'd be a great candidate for the position.
I am a vectorworks user for the past 17 yrs version 8 thru version 2017. I have developed scripts and plug-ins over the course of time. I am very familiar with the original vectorscript (pascal based), and the more recent python and marionette scripting.
If I understand your job brief correctly. You are looking for a tool similar to the 'Select similar tool', however you would like the new tool to automatically select similar objects based on an initial object selection from within the drawing.
This proposal is based on the job brief you included and may change if more details become available or the brief should change.
I'd love to talk to you further, I look forward to hearing from you
Adrian Hedley