Orcas Slicer is a fork of Bambu Studio, which is a fork of PrusaSlicer, itself a descendant of Slic3r.

Orca Slicer was forked to improve usability and features, not to get around any cloud printing requirements, Bamboo added those later and removed the ability to print locally.

It has to impersonate to transfer a gcode file locally, which is another open standard.

Bamboo restricted LAN printing, that is the issue.