Network Assignment Logic: When does Dokploy create a new network vs using dokploy-network?

[apujantega]

Question
I'm trying to understand the criteria Dokploy uses to decide whether to:

1. Connect a service to the existing dokploy-network (overlay)
2. Create a new project-specific bridge network

Current Behavior
Some projects automatically get connected to dokploy-network:
dokploy-network - overlay - 10.0.1.0/24

While others get their own isolated networks:
project-name_default - bridge - 172.x.0.0/16

What I'd like to know:
What factors determine this network assignment?

1. Project type (simple app vs docker-compose)?
2. Network configuration in docker-compose?
3. Number of services?
4. Specific settings in Dokploy?