FS-like permissions for files stored on oCIS

Is there any way to set FS-like permissions on files stored on oCIS? For example, make a file read-only for everyone, for a particular group, for a particular user, etc. Or, for example, “lock” a file like we can on MacOS to avoid accidental overwrites.

Keep in mind that ownCloud Infinite Scale has versioning and a trashbin, therfor accidents aren’t so much our challenge. Of course in a Space you can have edit rights or read only … for a single file however you might need to treat that differently in its own space and point to it with a link or so …