Expense Line DFF - Can we conditionally display a global segment ?

Summary

We need to capture a Reference Number against the Expense Line for some users. If we create a Expense Line Global DFF can this be displayed only for some Expense Templates?

Content

Customer has 2 distinct businesses each with their own BU, one requires a Reference Number on the Expense Line for certain groups of users to complete.  We will have a set of templates for each business.

I would like to create a global segment to capture the Reference on the Expense Line, is it possible to display this segment only for a specific set of templates or BU?