How could we add another attributes in the Lead Selection area to assign Leads records from thes Man

The customer have scheduled a pair of Lead Assignment processes in Sales cloud from ‘Manage Lead Processing Activities’ task. These processes were scheduled every hour all days, so a lot of Leads are updated every hour.

Today, the available attributes that appear in the Lead selection area to filter the Leads are (Please view Image 1):

• Age in days.
• Creation date.
• Import Activity Identifier.
• Rank.
• Assignment status.
• Source.
• Source code.
• Deal Size between.
• Accepted.
• Reassign.

But, due a sales Business flow of the customer we need to use another leads attributes like:

Last_update_Date, Last_Update_By, Business Unit or Lead Territory.