Yes, Its controlled by options in the Blpackage.
Open the blpackage and click on the fileentry ( a + symbol),
on the right hand side you will see different properties/options
one of them is Owner/Group ,like thsi
ModifiedDate May 1, 2012 11:50:06 AM
Permissions rw- r-- ---
just select OnwerOption and GroupOption to Ignore,
and it will create the file owned by user and group which actually deploys it, the user which is mapped to the role which has deployed the blpackage.