Identify Route's Group in Middleware

My ultimate objective is to limit accesses to the group of routes by validating permissions provided to the user.

These target 'group of routes' have ONE COMMON PARENT GROUP and may have zero or more sub-groups, such that, if access to these target 'group of routes' is permitted/accessible to the user then, all its sub-route groups are also accessible to the user.

To achieve this, I believe I need to differentiate these target group of routes by any uniqueString/parameter in middleware, which is indeed answered here.

But, I want to generalize this further, by applying middleware to common SINGLE PARENT GROUP of all these target group of routes and identify these target group of routes by any means in the middleware.

So, my question is how do I identify/differentiate these target group of routes in the middleware? Is there any way to do so?

via Chebli Mohamed