In most cases, it is not appropriate for a girlfriend to call her boyfriend's other girlfriends and tell them to stay away. Such behavior can be seen as possessive, controlling, and disrespectful towards the other individuals involved. Relationships are built on trust, open communication, and respect for each other's boundaries.
If you find yourself in a situation where you are uncomfortable with your boyfriend having other relationships, it's important to have an open and honest conversation with him about your feelings. Express your concerns calmly and try to understand his perspective as well. It's essential to communicate openly and find a resolution together, rather than resorting to confrontation or attempting to control the actions of others.
If your boyfriend is not being honest or transparent about his other relationships and this is causing you distress, it might be a sign of deeper issues within the relationship that need to be addressed. In any case, healthy communication is key to resolving conflicts and maintaining a strong relationship.