Passing ngFor variable to an ngIf template

All you need is to use [ngTemplateOutletContext] Read More

Here is the way how you can achieve that :

<div>
  <h3>All Templates</h3>
  <ul *ngFor="let number of numbers">
    <ng-container [ngTemplateOutlet]='number % 2 == 0 ? even_tpl : odd_tpl' [ngTemplateOutletContext]="{number:number}"></ng-container>
  </ul>
</div>

<ng-template #odd_tpl let-number="number">
  <li>Odd: {{number}}</li>  
</ng-template>

<ng-template #even_tpl let-number="number">
  <li>Even: {{number}}</li>  
</ng-template>

WORKING DEMO