Someone did post a workaround for this, but I believe we deleted the post. The workaround involved a lot of manual fiddling, in the registry as well. We didn't want to encourage customers to try this solution, as they could easily cause issues with their Lansweeper installation, not to mention their server itself.
Setting up multiple Lansweeper services on the same machine is not officially supported at this point. We can't provide instructions for this.