If users do not have the right to search in a file cabinet, they cannot open the internal DocuWare select list in search dialogs either. This is not the case with specially created select lists, or even with fixed and external select lists. Users can access these even without the right to run searches, provided that the select list has been enabled for a field of an assigned store dialog.
If you want users who do not have the right to search in a file cabinet to be able to use the internal select list for a special field when storing documents, do the following:
Create an external select list which is based on the relevant column of the file cabinet table and then assign the select list to the field and the store dialog.