Yes, if they look at your profile, it will show up there. But you are a freelancer, as long as you can handle the workload and didn't sign or agree to only working for one client (not employer), then you're free to take on as many contracts as you can handle.
We don't work for employers. We work for clients. It is normal for freelancers to have multiple clients. It is not an issue.
But, yeah, if you have too many clients at one time, you won't be able to give each one the attention they deserve. So one needs to be cautious.