Thank you for the answer, but that means that I would need to add tags for each of the artifact in a module based on which heading they are "under", correct?

Yes, and I include the tag to the heading, too.  Example: for my Section 3 view, there is a "Sec3" tag for the Section 3 heading and all its descendants. I use this way of sectioning the modules for very large modules with many links.  It helps the module load faster if I'm only working in a specific section. I haven't seen an option in filtering like they have in Classic DOORS, where you can add a filter of an Object plus it's descendants or ancestors. That would be nice to have in DOORS Next.

Thank you again for the answer, it is useful, however for all already existing modules can be really problematic to add all the tags... correct? (Or there is a quick way that it's not manual one by one?)

It would be per module. You do have the option to show specific levels within a module, [right click at top of a column within a module> select first option to show full hierarchy or specific levels]. The hierarchy can be saved to a view. You could make that hierarchy view a preferred view in your module types.