Hi Joan,
You first need to define this embedded data in the survey flow and then you can add the same as an attribute in the user (Edit User in user admin tab) and then restrict the required data.

Hi joan_raventos , Have you tried adding this specific role type to your original *.xls/*.csv participant file as a new variable column header with 1= yes and 0 = no (for example) to define the group/role that you need to use as a filter? If you do, you will then need to re-upload your participant file, refresh metadata and in the role definitions of the participants you should see 'field' and then select field. Your new meta data column should be visible here to select.

joan_raventos if you change the Field type to a Multi Answer Text Set under Dashboard data then you will be able to access that field under the permissions tab for data restriction.