Hello, Ion!
Thank you for your interest to 1C:Enterprise platform.
If I understood you correctly, in Designer mode when you create a flowchart, you need to add a value to the addressing attribute of an Activity point.
For this you need to have a predefined value in the catalog, that you have selected as a type of AddressingAttribute.
In addition, you can use an information register with 2 or more dimensions to create predefined items only for groups of users: Department and User. Department is the main addressing attribute and the corresponding catalog will be used to specify tasks. The information register will be used to check, if the current user, which is specified in CurrentUser session parameter belongs to the department.
Please see the attached configuration as an example.