Lets say you are going to obtain 5 new links with the intention of increasing SERP What effect does the following have ? 50 sites with 50 seperate IPs but all the domains registered to the same person ?
I think the links would count just as any other links. If your website somehow triggered a manual review, I'm not so sure that they would like these links. Just work at getting enough quality links and they will be more inclined to disregard things like this.