Version 3.1.0 of rsync introduced the "--usermap" and "--groupmap" mentioned by Thomas, but also the convenience option "--chown", which works well for your scenario.
This option forces all files to be owned by USER with group GROUP.
This is a simpler interface than using --usermap and --groupmap directly,
but it is implemented using those options internally, so you cannot mix them.
If either the USER or GROUP is empty, no mapping for the omitted user/group will
occur. If GROUP is empty, the trailing colon may be omitted, but if USER is
empty, a leading colon must be supplied.
If you specify "--chown=foo:bar, this is exactly the same as specifying
"--usermap=*:foo --groupmap=*:bar", only easier.
Also, at least on my systems, the -o and -g options were required. Excluding them would fail to update their respective attribute, but produce no error.
rsync -og --chown=cmsseren:cmsseren [src] [dest]