We have an IF statement within our smarty templates, which is as follows:
{if $category->id == 90}
you can just chain them like this:
smarty:
{if $category-> == 90 || $category->id == 95 || $category-> == 96}
{/if}
You can read more about this topic in the official docs: https://www.smarty.net/docsv2/de/language.function.if.tpl