Yes, it's possible.
Please check in MA 4.6 into Evaluation branch of the master repository and 4.0 in current branch.
Thanks, evaluation brach though is greyed out when checking the package in, only current is available.
By default only current branch will be enabled.
Please enable other branches from the ePO server (Menu=>Configuration=>server settings=>Repository packages=>Edit=>Allow package check-in for any repository branch).