The Rule and Rule sets available in a cash process differ to those in a generic two-sided process. Tolerances are only selectable for Date fields. All other field types will show only Matching Control rules. An Accounts field will not allow you to select any sort of rule.
*Rules & Rule sets configured here are applied at the field level, meaning they are applied to the field regardless of the Account. The Account level tolerances for amount are defined on the Accounts menu