Mysql to Oracle migration using other user

Is it possible to modify the schema name of the the migrated schema on Oracle side during migration from Mysql ?
Default behavior is to create a new user with the same name as the mysql schema which is migrated .

Your question isn't clear.

Are you using the Migration Wizard? If so you can specify the 'target database connection' as discussed in the Sql Dev user guide

http://docs.oracle.com/cd/E25259_01/appdev.31/e24285/migration.htm

Target Database

The Target Database page of the wizard specifies the Oracle database to which the third-party database or databases will be migrated.
Mode: Online causes the migration to be performed by SQL Developer when you have completed the necessary information in the wizard; Offline causes SQL Developer to generate scripts after you have completed the necessary information in the wizard, and you must later run those scripts to perform the migration.
Connection: The database connection to the Oracle Database user into whose schema the third-party database or databases are to be migrated. To add a connection to the list, click the Add  icon; to edit the selected connection, click the Edit (pencil) icon.