could a file be double-licensed?

[yarikoptic]

in our project, which is currently under MIT license, we thought to make use of starcluster/sshutils.py where you nicely implemented interactions with remote ssh hosts. But starcluster itself is under LGPL, so we could indeed just use it at run time but we need just that file so we hoped to be able to carry a copy of it within our project without causing it becoming LGPLed.

Would it be possible/feasible to get that file released also under more permissive license (e.g. MIT)?