Hello Yohann,
Using different templates in the same ListView is not possible. Using jQuery to append/prepend items in the ListView is not recommended as well, if you want to this operation you need to use the
built-in methods however they will still render the items using the current template.
In general Kendo UI Templates support full JavaScript code execution inside, so you can create a conditional logic and based on the type of data that is being rendered you can execute certain part of the template. It makes the template a bit complicated, but will give you better results comparing the other approaches. You can read more about how to execute JavaScript code in a template here:
http://docs.telerik.com/kendo-ui/getting-started/framework/templates/overview
Regards,
Kiril Nikolov
Telerik
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