add additional lifecycle status

Is it possible to add an additional Lifecycle status. MOS 1520557.1 say's it's not possible.

Present LF are Mission  Critical, Production, Staging, Test, Development.

The reason we need this is that project related targets require a Lifecycle Status, but we do not want to see these targerts in our Groups (our Groups are formed on the basis of Lifecycle Status).

Groups can be created on basis of a criteria, but we cannot exclude targets on the basis of a property. That would be very handy.

We filter these targets out of the incident monitoring by adding "Project" in the Comment field.