Hi Manuela,
In previous version(before 2019 wave 2), it is possible to show related segments of one contact person in tab, because there was linked relationship between two entities.
However, the design has changed in recent version, the Segment uses a new mechanism to collect members, the process is one-way.
Currently the workaround would be iterating all segment records, and list all members by msdyncrm_FetchContactsByQuery action,
if current contact could be match to any retrieved member, then push the eligible segment record into an array.
Regards,
Clofly