Yes and no.
There is currently no way to use
dput to upload a package that builds for multiple Ubuntu releases. However, you can accomplish your goal using one of these two methods:
Create a Recipe
If you are building a package from a branch on Launchpad and you have Debian packaging, create a daily build recipe that targets the Ubuntu releases you wish to support. This is described in more detail in the latter half of this answer.
This is really the best solution since it also automates new builds every time you make a change (with a limit on one automatic build per day, although you can manually dispatch additional builds).
Upload Multiple Builds Manually
This is not an ideal solution - but it works. What you need to do to make this work is:
Adjust the version number in the changelog to match this format:
[version] is the package version and
[release] is an Ubuntu release codename (like
Make sure the changelog is set to build the correct release. In other words, for Trusty, the first line of your changelog should look like this:
ffc (1.3.20140513-1ppa1~trusty1) trusty; urgency=medium
Upload the package using
dput and then repeat the two steps above for each release you want to upload packages for. You can see an example of how this works here.