Short answer: Yes - for Open Channels. But for Group Channels - No.
To kick a user out from an Open Channel, you can ban a user. Banning a user will prevent the user from joining the channel.
You can ban a user from the Dashboard by navigating to the Open Channels tab. In the right-side menu where online users are listed, click on the three dots beside the target user and select BAN. You can specify the duration of the ban, and also add a description on why the user had been banned.
Additionally, it is possible to use the Platform API to ban a user. Please refer to the documentation below:
After banning the user, you can receive a UserBanned event from your app’s Channel Handler/Delegate in order to handle changes in UI.
Kicking a user out of a channel is not possible in Group Channels. However, a user is able to block another user through the Platform API. Users will not receive message from anyone that they have blocked.