Is it possible to map a column from an import file into an Integration Special Field?

Is it possible to map a column from an import file into an Integration Special Field?

It doesn't appear that I can select the field to map to when importing a file. Sometimes we input the data through the form and sometimes we load records via a file with hundreds of records. Is there any work around or something that I am missing? I would be loading the data with the same value (Zoho CRM Service for Account Name is the Special Field).