AFAICT it is not possible to see whether a table is “owned” by an app or shared between apps. This is especially relevant when sharing the users table between apps.
When one clones an app the tables are copied. So even based on the data the difference between owned and shared is even harder.
@meredydd May I be so impolite as to bump this issue? I feel really insecure when I delete/modify tables that are shared (mostly user tables). It feels like this would not be difficult to fix (might be wrong of course)…