Variable node that has a value for each user

Variable node that has a value for each user, each user can modify the value for this variable and can see the value of this variable for each user.

For example:

The node called car has two fields that depend on the user: insurance, with test.

The user A may indicate on that node if he has car insurance and test, but also he can see in the profile's user of B if the user B has car insurance and test for the same node.

I hope to have explained well because my English is not very good. Thanks and greetings