No. you cannot use same ip on two recievers.
Network cards will give conflict if you are using same ip. and both boxes will not work .
If you can tell me exactly what do you want to do may be we can help.
What is ur objective? why u need same ip on two recievers.
If you want to run to boxes on cardsharing to a third box which is outside ur network that can be done with different ips too.
So please explain your question ., \
what is ur set up ?
What do you want to do ?
What is ur objective and may be someone can guide u better.