the usual application of shiro is like this.
if there are mobile users and mobile phones, the mobile phone has many functions, such as gesture manipulation, call, video playback, text function, etc.
each function as a menu
user A has the permission to gesture and play video
user B has text function and call permission
so that different users have different functions (or role). Then role corresponds to the permissions of different functions)
so when used, it is roughly like the following

@ RequiresPermissions ("text:view"}
void listText () {...}

now the scene is more complicated
suppose that a user can use multiple phones and have different permissions for the same function of different phones
for example, users have two mobile phones An and B
users have permission to gesture to A
to B but not
how does shiro deal with this situation?