Welcome to the Arkio community @lmcarreiro good to hear your feedback
We’re currently working on Layers for Arkio 2.0, starting with layers for imported files from our plugins. You can try this out for yourself by installing the Arkio Beta
For Revit/Rhino/Sketchup/Archicad models, layers have a hierarchy per model. We currently don’t show layers yet for native Arkio geometry and objects but this is on our roadmap for future releases.
Locking/freezing geometry is not possible from the layers tab, but you can use Arkio’s pin tool to pin down objects and prevent them from moving.