This is highly dependent on the inferences you want to make and the rules that you are using. You could for example use

ont1:hasNetworkLevel owl:equivalentProperty ont2:hasNetworkLevel .

However, I suggest you check the inferences after any changes you made to see whether get the expected inferences.

If this does not work, please provide minimal complete example of your data and the inferences you expect as well as the rules you are using.