Same resource requirement in a route operation

Hi all,

Is there anyway to indicate that a route operation needs to be performed by the same resource than another operation in the same route?

Let's say that for example a process starts in Machine 1 which belongs to Resource Group 1 (and my resource requirement is set to Resource Group 1). Then this machine gets available to be scheduled on another production order. However, another operation from my original production order that is executed later has the same requirement (Resource Group 1), how can I avoid to allocate Machine 2 (suppose that Machine 2 also belongs to Resourse Group 1) and necessarily allocate Machine 1 again?

Another question: is it possible to repeat the same operation id. in the same route? For explample, a "Cut" operation that could occur at different times in the same process.

Thanks in advance.