Not sure what you are asking?
Do you mean if it is possible to have use 2 Google Home Apps on the same WiFi network?
If so, yes this is possible but if you want to control the same devices it easier to setup family members so this way you can share the home and devices within 1 Google Home household.
Check THIS link.
Thanks for the help, RXShorty!
LarsZahle, Google Home App now allows you to add additional Homes to your account making it easier to manage devices that are located in different homes.
Hope this helps.