Manipulate product category query

filter_product_category.php

function display_user_subscription_product( $product_ids ) {
		// Only on Product Category archives pages
		if( is_admin() || ! is_product_category( 'membership' ) || ! is_user_logged_in() ) return $product_ids;

		$subscription_product_id = get_user_meta( get_current_user_id(), 'current_user_subscription_product_id', true );

		if ( is_numeric( $subscription_product_id ) && ! empty( $subscription_product_id ) ) {
			$product_ids[] = $subscription_product_id;
		}
		return $product_ids;
}
add_filter( 'loop_shop_post_in', 'display_user_subscription_product', 10, 1 );