Hi @jas condes!
Yes, it's possible.
For example, in this example, I export assets using ARS_ASSET object structure.


In this example, someone need hide ASSETID (Column M).
Then, in Object Structure application, I need to excep that field from the ARS_ASSET OS. To do that exclude field (open that option from contextual menu) and find ASSETID field

You set "Exclude" and save.

and when you export again, the ASSETID column will no longer be visible

You can do this exclusion for all the fields that are allowed in the structure.
Something important. This structure may also be used to import objects. You should keep in mind that you should not "exclude" a field that is used for the import.
Regards!