using context person id in DFF Value Set from add absence page

Summary:

Our requirement is to display earned compoff dates in DFF field while applying the absence.
Created Field and a value set to fetch the data from element entries.
When employee logs in to apply absence for him/her self, its working fine as its fetching logged in colleague deatils.

But from Line manager login, when manager tries to apply absence for employee, still the DFF is showing Manager details
Our requirement is to display details of the person for whom the absence is applying.

The DFF 'ANC_PER_ABS_ENTRIES_DFF' has no parameter for Person id to use bind parameter in value set.