No. Customers, suppliers, and employees are all subsidiary ledgers of control accounts. (So are other things listed.) Each individual subsidiary ledger can only be subordinate to a single control account. If multiple control accounts were allowed, the balance for a customer, supplier, employee, etc., could not be calculated, because the transactions would be scattered in several places.
Employees are interconnected with other hard-coded accounts. Moving them to a different control account besides Employee clearing account would interfere with payslips, payslip items (earnings, deductions, and contributions), payroll liabilities, wages and salaries, and expense claims.
As for custom lists, the current choices already include all types of subsidiary ledgers except employees. And you certainly cannot mix one type of subsidiary ledger with another in a control account.