Can we automate the Custom Holds application & Release for Misc. Line Type?

Summary

Can we automate the Custom Holds application & Release for Misc. Line Type?

Content

For an Invoice having Item Type Line, Tolerance apply as these lines are matched to the PO. But when we enter Misc. Type Line, Invoice Tolerance does not apply because this Misc. cannot be matched to PO Lines.
We are looking for a solution to be able to apply the custom hold on Misc. Line Type invoices and release them automatically.
Is this possible in cloud SAAS model.
Other than Invoice Approval Rules, Could you pls suggest any other alternate solutions.