How to customize DevOps Services workflow

Hello,

We use Azure DevOps Services and inherited processes.

Is there a way to customize logic/rules of moving items from one state to another?

In general I need to allow moving from a state to allowed states only, not from any to any as it is by default. For example, I'd like to allow changing state from In Progress to To Be Verified and deny to change directly to the Completed state.

I have tried to find an answer but as far as I see it's possible to customize transitions on-premise or when you have migrated to the cloud.

Thanks in advance.