Hi,

it would be great if it were possible to be able to split these two
groups so that one can easily see where a package was most likely
installed from.

For "Installed", this would display the release providing the currently
installed version.

For "Upgradeable", this would be the release providing the version that
would be upgraded to.

The ordering of releases would be according to the "*" pins on them; a
package shows up in the list for the release with the highest priority.

For example, if a package is available from stable in version 1, from
backports.org in version 2~bpo, from testing in version 3 and from
unstable in version 4, version 2 was installed and pins were "stable >
backports > testing > unstable", we'd end up with the package sorted
below "Upgradeable to testing", while version 1 would be added to
"Installed from stable".

   Simon