Incoming Webhook security

Hi,

anyone got a solution to add security to the Incoming Webhook feature ? I realize the risk is not high but still, I would like to make more secure than what is provided currently. 

In the message to warn us this was coming, MSFT mentions "We're transitioning to a new webhook URL format where is friendly short name for the tenant. Your organization can use to filter egress traffic”. 

How can this filtering be achieved ?

Thanks in advance for your suggestions