helooooooooooo HA 🙂

[pliant kayak]

Yes, you can, though it won't do what you want

You can only sensibly group things that have the same states and/or domain, grouping person and input_boolean won't work the way you want

[rotund dome]

input_boolean:
guest_home:
name : Guest

family:
name: Family
all: false
entities:
- person.nico
- guest_home

something like this wont work ?

[pliant kayak]

No, because the boolean is on/off and the person is home or not_home or ... something else

[rotund dome]

looks logic
I'll then put the logic in node red