You are adding Contacts to a Target Group and you want to use the field Marketing Attributes which is available for the section Account.
Reproducing the Issue
1. Go the Sales Campaign workcenter.
2. Go to the Target Group view.
3. Open any Target Group.
4. Go to the Members facet.
5. In Adaptation Mode, click Add to add a new member.
6. In the popup window, note the field Marketing Attributes in the Account section.
7. Scroll to the Contacts section, hover over a field and click the icon to add a new field.
Result: The field Marketing Attributes is not available to be added in the Contacts section.
The field Marketing Attributes is not available for every section; it is only available once in the Add Members function.
You can drag and drop the field to the Contacts section to make it available when you are adding Contacts.
KBA , SRD-CC , Cross Components , How To