Solution
The top-level NI Linux Packages follow the naming format of ni-.... Using the Ubuntu native package manager (apt-get), you can use a regular expression to remove them.
command: sudo apt-get autoremove '^ni-.*'
Note the autoremove, as it is required to remove NI package dependencies.
Additionally, you can use dpkg-query to list packages with "ni.com" homepage
For example, running command: sudo dpkg-query -W -f='Package: ${Package} - ${Homepage}: ${Status}\n' | grep ni.com
This won't remove any software, but will provide you a list.